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CD8+ T cell responses in convalescent COVID-19 individuals target epitopes from the entire SARS-CoV-2 proteome and show kinetics of early differentiation Hassen Kared 1 *, Andrew D Redd 2,3 *, Evan M Bloch 4 *, Tania S. Bonny 4 , Hermi Sumatoh 1 , Faris Kairi 1 , Daniel Carbajo 1 , Brian Abel 1 , Evan W Newell 1,7 , Maria P. Bettinotti 4 , Sarah E. Benner 4 , Eshan U. Patel 4,6 , Kirsten Littlefield 5 , Oliver Laeyendecker 2,3 , Shmuel Shoham 3 , David Sullivan 5 , Arturo Casadevall 5 , Andrew Pekosz 5 , Alessandra Nardin 1 , Michael Fehlings 1 § # , Aaron AR Tobian 4 § # and Thomas C Quinn 2,3 § 1- ImmunoScape Pte Ltd, Singapore 2- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA 3- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA 4- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA 5- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA 6- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA 7- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA *-These authors contributed equally §-Shared senior authorship #-Corresponding authors: Aaron AR Tobian ([email protected] ), Michael Fehlings ([email protected]) . CC-BY-ND 4.0 International license available under a (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made The copyright holder for this preprint this version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688 doi: bioRxiv preprint

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Page 1: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

1

CD8+ T cell responses in convalescent COVID-19 individuals target epitopes from

the entire SARS-CoV-2 proteome and show kinetics of early differentiation

Hassen Kared1*, Andrew D Redd2,3*, Evan M Bloch4*, Tania S. Bonny4, Hermi Sumatoh1, Faris Kairi1,

Daniel Carbajo1, Brian Abel1, Evan W Newell1,7, Maria P. Bettinotti4, Sarah E. Benner4, Eshan U. Patel4,6,

Kirsten Littlefield5, Oliver Laeyendecker2,3, Shmuel Shoham3, David Sullivan5, Arturo Casadevall5, Andrew

Pekosz5, Alessandra Nardin1, Michael Fehlings1§#, Aaron AR Tobian4§# and Thomas C Quinn2,3§

1- ImmunoScape Pte Ltd, Singapore

2- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National

Institutes of Health, Bethesda, MD, USA

3- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA

4- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA

5- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public

Health, Baltimore, MD, USA

6- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD,

USA

7- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA,

USA

*-These authors contributed equally

§-Shared senior authorship

#-Corresponding authors: Aaron AR Tobian ([email protected]), Michael Fehlings

([email protected])

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Abstract

Characterization of the T cell response in individuals who recover from SARS-CoV-2 infection is critical to

understanding its contribution to protective immunity. A multiplexed peptide-MHC tetramer approach was

used to screen 408 SARS-CoV-2 candidate epitopes for CD8+ T cell recognition in a cross-sectional

sample of 30 COVID-19 convalescent individuals. T cells were evaluated using a 28-marker phenotypic

panel, and findings were modelled against time from diagnosis, humoral and inflammatory responses. 132

distinct SARS-CoV-2-specific CD8+ T cell epitope responses across six different HLAs were detected,

corresponding to 52 unique reactivities. T cell responses were directed against several structural and non-

structural virus proteins. Modelling demonstrated a coordinated and dynamic immune response

characterized by a decrease in inflammation, increase in neutralizing antibody titer, and differentiation of a

specific CD8+ T cell response. Overall, T cells exhibited distinct differentiation into stem-cell and

transitional memory states, subsets, which may be key to developing durable protection.

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Introduction

The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has rapidly evolved

into a global pandemic. To date, over 35 million cases spanning 188 countries or territories have been

reported with more than one million deaths attributed to coronavirus disease (COVID-19). The clinical

spectrum of SARS-CoV-2 infection is highly variable, spanning from asymptomatic or subclinical infection,

to severe or fatal disease 1,2. Characterization of the immune response to SARS-CoV-2 is urgently needed

in order to better inform more effective treatment strategies, including antivirals and rationally designed

vaccines.

Antibody responses to SARS-CoV-2 have been shown to be heterogenous, whereby male sex, advanced

age and hospitalization status are associated with higher titers of antibodies 3. Low or even undetectable

neutralizing antibodies in some individuals with rapid decline in circulating antibodies to SARS-CoV-2 after

resolution of symptoms underscores the need to assess the role of the cellular immune response 4.

Multiple studies suggest that T cells are important in the immune response against SARS-CoV-2, and may

mediate long-term protection against the virus 5–9.

To date, studies that have evaluated SARS-CoV-2-specific T cells in convalescent individuals have focused

on either characterization of responses to selected, well-defined SARS-CoV-2 epitopes, or broad

assessment of T cell reactivity against overlapping peptide libraries 6–10. The assessment of the complete

SARS-CoV-2 reactive T cell pool in the circulation remains challenging, and there is still much to be learned

from capturing both the breadth (number of epitopes recognized) and depth of T cell response

(comprehensive phenotype) to natural SARS-CoV-2 infection. A study by Peng et al. indicated that the

majority of those who recover from COVID-19 exhibit robust and broad SARS-CoV-2 specific T cell

responses 8. Further, those who manifest mild symptoms displayed a greater proportion of polyfunctional

CD8+ T cell responses compared with severely diseased cases, suggesting a role of CD8+ T cells in

ameliorating disease severity.

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Many current COVID-19 vaccine candidates primarily incorporate the SARS-CoV-2 spike protein to elicit

humoral immunity 11–13. However, whether these approaches will induce protection against SARS-CoV-2

infection, or COVID-19 remain unknown. Gaining insight into the immune response that is induced by

natural SARS-CoV-2 infection will be key to advancing vaccine design. Specifically, there is a need to

identify what T cells are targeting in the viral proteome, their functional characteristics, and how these might

correlate with disease outcomes. In this study, our analytical strategy progressed beyond these earlier

findings by identifying dozens of epitopes recognized by CD8+ T cells that spanned different viral proteins

in COVID-19 convalescent subjects, and simultaneously revealed the unmanipulated phenotypic profiles of

these cells. These new findings can be exploited to further guide epitope selection for rationally designed

vaccine candidates and vaccine assessment strategies.

Results

SARS-CoV-2-specific CD8+ T cell response in COVID-19 convalescent donors is broad and targets

the whole virus proteome

To study the SARS-CoV-2 specific CD8+ T cell repertoire in COVID-19 convalescent donors, a mass

cytometry-based multiplexed tetramer staining approach was employed to identify and characterize (i.e.

phenotype) SARS-CoV-2-specific T cells ex vivo (Figure 1A). A total of 30 convalescent plasma donors

(confirmed by PCR at time of infection) with HLA-A*01:01, HLA-A*02:01, HLA-A03:01, HLA-A*11:01, HLA-

A*24:02 and HLA-B*07:02 alleles were evaluated 3. The individuals included 18 males and 12 females

ranging between 19 and 77 years old, and were a median of 42.5 days (interquartile range 37.5-48.0) from

initial diagnosis (Table S1). The population was grouped into tertiles according to their overall anti-SARS-

CoV-2 IgG titers, based on semi-quantitative ELISA results against SARS-CoV-2 S protein (Table S2).

Additional plasma-derived parameters such as neutralizing antibody titers, inflammatory cytokines and

chemokines were used to associate the cellular SARS-CoV-2-specific T cell response with the humoral and

inflammatory response (Figure 1A). There was a strong correlation between the donors’ anti-S IgG levels

and the neutralizing antibody activity (Fig S1A). Levels of some inflammatory mediators were associated

with age, sex, neutralizing antibody activity and neutralizing antibody titers (Fig S1B-D).

Hundreds of candidate epitopes spanning the complete SARS-CoV-2 genome were recently identified as

potential targets for a CD8+ T cell response to SARS-CoV-2 14,15. A triple-coded multiplexed peptide-MHC

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tetramer staining approach was used to screen 408 potential epitopes for recognition by T cell responses

across 6 different HLA alleles: HLA-A*01:01, HLA-A*02:01, HLA-A03:01, HLA-A*11:01, HLA-A*24:02 and

HLA-B*07:02 16,17. In addition, CD8+ T cells were probed for reactivity against up to 20 different SARS-

CoV-2-unrelated control peptides per HLA for each sample (CMV-, EBV-, Influenza-, Adenovirus-, and

MART-1-derived epitopes; Table S3). The detection of bona fide antigen-specific T cells was based on the

assessment of several objective criteria such as signal versus noise, consistency between two technical

replicates, and detection threshold. In this study, an average limit of detection of 0.0024% (bootstrapping

confidence interval of 0.0017 and 0.005 under a confidence level of 95%) was achieved for antigen-specific

T cells. Depending on the individual’s HLA allele repertoire, between 48 and 220 peptides were

simultaneously screened per participant.

Figure 1B shows an example of the identification of antigen-specific CD8+ T cells in a COVID-19

convalescent donor screened for a total of 145 SARS-CoV-2 antigen candidates and 32 common (SARS-

CoV-2 unrelated) control antigens across two HLA alleles. CD8+ T cells reactive to six different SARS-

CoV-2 epitopes and eight control antigens were detected, including peptides derived from Influenza (FLU),

Epstein Barr Virus (EBV), and Cytomegalovirus (CMV). In parallel, commercially obtained healthy donor

PBMCs were run and similar common virus antigen specificities were identified. Notably, SARS-CoV-2

specific CD8+ T cells were not detected in any of the healthy donors recruited before the official SARS-

CoV-2 pandemic (n=4).

Amongst all 408 SARS-CoV-2 peptide candidates tested, 52 unique peptide reactivities (hits) were

detected which were distributed across a total of 132 SARS-CoV-2 peptide epitopes (Fig. 2A). Almost all

individuals screened demonstrated a CD8+ T cell response against SARS-CoV-2 (29/30), and individual

hits ranged from 0 to 13 with >40% of all individuals showing more than five different SARS-CoV-2

specificities. The frequency of these cells ranged from 0.001% to 0.471% of total CD8+ T cells (Table S4).

In addition, a total of 130 T cell hits against common control peptides were detected in these donor

samples (0.001%.to 1.074% of total CD8+ T cells) (Table S4). Interestingly, the majority of unique T cell

hits were directed against epitopes associated with non-structural proteins such as nsp, PLP and ORF3a

(Fig 2B). Of all the hits that were detected in the cross-sectional sample, the most common reactivities

were against spike (structural, 23.02%) and ORF3a (non-structural, 19.42%). By contrast, nucleocapsid-

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specific CD8+ T cells had significantly higher frequencies as compared to spike- or non-structural protein-

specific T cells (Fig. 2C). The total number of recognized epitopes was distributed differently across the

individual HLA alleles that were tested (Fig 2D and Fig S2), whereby T cell responses were identified

against six to 14 different epitopes per allele (Fig 2E). For the purpose of the study, events detected in at

least three donor samples or in more than 35% of donors for each allele group were defined as SARS-CoV-

2 high-prevalence epitope hit responses.

Based on these criteria, at least two peptides per HLA allele were defined as high-prevalence response hits

(Fig 2E). Of note, the frequencies of high-prevalence SARS-CoV-2-specific T cells were significantly higher

as compared to their low-prevalence counterparts (Fig 2F). Frequencies of high-prevalence SARS-CoV-2-

specific T cells were similar to those of FLU-specific T cells detected in the same cross-sectional sample,

but significantly lower than frequencies of T cells reactive for EBV or CMV peptides (Fig 2F). In summary,

these data show a reliable detection of multiple SARS-CoV-2 T cell hits and indicate a broad recognition of

epitopes by CD8+ T cell responses against the SARS-CoV-2 proteome during recovery from COVID-19.

SARS-CoV-2-specific CD8+ T cells exhibit a unique phenotype and can be classified into different

memory subsets

Our multiplexed tetramer staining approach enables deep phenotypic characterization of antigen-specific T

cells. By using a panel comprising 28 markers that were dedicated to T cell identification and profiling,

including several markers indicative of T cell differentiation (Table S5), the phenotypic profiles of all SARS-

CoV-2-specific T cells detected in this cross-sectional sample were further analysed.

To compare the phenotypes of antigen-specific T cells targeting different SARS-CoV-2 proteins, the

frequencies of T cells expressing all markers were determined (Fig 3A). Despite some phenotypic

heterogeneity, the majority of SARS-CoV-2-specific T cells grouped together and were distinct from T cells

that were specific for CMV-, EBV-, or FLU-derived epitopes detected in the same samples; the same

outcome was reached when displaying the data as a two-dimensional UMAP plot (Fig 3B). SARS-CoV-2

specific T cells showed an intermediate phenotype between MART-1-specific T cells, which are

predominantly naïve (CCR7 high and CD45RA high), and memory FLU-specific T cells 18.

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An early differentiated memory phenotype has recently been described for SARS-CoV-2-specific T cells 9.

SARS-CoV-2-specific T cells were separated into subpopulations based on the stages of T cell

differentiation, further split into high- and low-prevalence response hits as earlier defined, and their

frequencies compared with one another, as well as with total CD8+ T cells. Likewise, these were compared

with the differentiation profiles of T cells reactive against common virus antigens and MART-1. The

classification into functionally different T cell subsets following antigen encounter is based on the

expression of different marker combinations, which describe a progressive T cell differentiation and allow to

delineate a dynamic transition between memory and effector cell function 19 (Fig 3C and S3). When

compared to the total CD8+ T cell population, SARS-CoV-2-specific T cells were significantly enriched for

cells with stem-cell memory (SCM) and transitional memory cells 2 (TM2) phenotypes. More specifically,

high-prevalence SARS-CoV-2-specific T cells were skewed toward a phenotype that is typical of terminal

effector memory cells re-expressing CD45RA (TEMRA), effector memory cells (EM) and TM2 cells, while

their low-prevalence counterparts were enriched with SCM and central memory (CM) cells. In contrast,

MART-1-specific T cells were naïve, FLU-specific T cells were predominantly of a TM2 phenotype, EBV-

specific T cells were largely characterized by TM1 and CM phenotypes, and CMV-specific T cells were

more differentiated as reflected by a strong effector component.

Expansion of highly differentiated SARS-CoV-2-specific CD8+ T cells in convalescent donors

To gain further insight into the phenotypes of SARS-CoV-2-specific CD8+ T cells, the expression of all the

phenotypic markers were compared between T cells exhibiting high- with those exhibiting low-prevalence

epitope responses. Similar to our findings in the total pool of SARS-CoV-2-specific CD8+ T cells, a

heterogenous marker expression was detected across these cells, but no specific clustering with respect to

the epitope response prevalence (Fig S4A). To further compare the phenotypes of T cells from high- vs.

low-prevalence epitope response categories, the high-dimensionality of the dataset was reduced and the

phenotypic information plotted from Figure S4A using principal component analysis (PCA) (Fig S4B). The

PCA displayed a skewing of high-prevalence SARS-CoV-2-specific T cells towards late T cell differentiation

(CD57 and CD161), in contrast to the low-prevalence response hits characterized by early differentiation

markers (CD27, CD28, CCR7). In order to quantify this spatial distribution, the individual expression of all

markers was evaluated and the frequencies for each marker compared between the high- and low-

prevalence response hits. Significantly higher frequencies of T cells expressing CD57 and Granzyme B

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were detected amongst high-prevalence SARS-CoV-2-specific T cells, while the frequencies of CCR7-

expressing cells were substantially higher amongst the low-prevalence hit responses (Fig 4A). These

findings were further confirmed when overlaying the SARS-CoV-2-specific T cells on a two-dimensional

UMAP plot created based on the full phenotypic panel (Fig 4B). The majority of T cells that had been

categorized as high-prevalence response hits were associated with the expression of CD57 and Granzyme

B, while their low-frequency counterparts detected in the same donors were characterized by a high CCR7

expression.

High-prevalence SARS-CoV-2-specific T cells were detected at a higher frequency (Fig 2F) as compared to

their low-prevalence counterparts. Therefore, assessment of the magnitude of the SARS-CoV-2-specific T

cell response was also correlated with their phenotypes. Interestingly, a negative correlation between the

frequency of SARS-CoV-2 specific CD8+ T cells and the expression of markers associated with early T cell

differentiation was observed (CD28, CCR7, CD127, CD27, CD38, and CXCR3) (Fig. 4C and 4D). In

contrast, the level of expression of markers that are associated with late stage T cell differentiation (CD244,

CD57, Granzyme B, and KLRG1) correlated positively with increasing frequencies of SARS-CoV-2 specific

CD8+ T cells.

Time-dependent evolution of SARS-CoV-2-specific CD8+ T cell response, inflammation and humoral

immune response

To examine the relationship between inflammation, humoral immunity, and the T cell response, the

frequencies of SARS-CoV-2-specific CD8+ T cells were evaluated against their IgG to Spike titer and

neutralizing antibody activity (measured by NT AUC) (Fig 5A). Interestingly, although the phenotypic

clustering of SARS-CoV-2-specific CD8+ T cells was not associated with IgG titer tertiles (Fig S4A), NT

AUC correlated negatively with expression of markers associated with an immature or early differentiated

phenotype (CCR7, CD28, CD45RA, CD127, CXCR3), while correlating positively with CD57 and CD161

(Fig 5A-B). Next, assessment of the association between inflammatory molecules and SARS-CoV-2-

specific T cells was conducted. Inflammation can indirectly regulate the persistence of antigen-specific T

cells in the absence of TCR stimulation or during chronic infection by modulating the homeostatic cytokine

profile 20,21. Overall, the correlation between inflammatory mediators and the expression of individual

markers on SARS-CoV-2-specific T cells, or the T cell frequency, remained weak (Fig 5A). Finally, the

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evolution of the SARS-CoV-2-directed T cell response against time based on the last detection of SARS-

CoV-2 specific mRNA was modeled in each donor (Table S1). Interestingly, an increase in the breadth of

the specific CD8+ T cell response was observed during the resolution phase of the disease, peaking at

approximately six weeks (Fig S5). Longer recovery time was associated with higher frequencies of cells

expressing markers of terminal T cell differentiation (CD57, CD244 and KLRG-1) and activation (HLA-DR),

indicating a positive correlation between recovery time and T cell maturation (Fig 5A and 5C). Plasma

levels of several cytokines (IL-18, TARC, MCP-1, VEGF) also decreased over time suggesting a negative

correlation between recovery time and inflammation (Fig S1A).

These data suggest that during early recovery from COVID-19, an overall, time-dependent decrease in

inflammation is associated with sustained and effective antibody neutralizing activity with progressive

differentiation of a broad and functional SARS-CoV-2-specific CD8+ T cell response (Fig S6).

Discussion

An improved understanding of natural immunity to SARS-CoV-2 is needed to advance development of

prevention strategies and/or treatment options for COVID-19. Recent findings suggest that T cells confer

protection, whereby virus-specific memory T cell responses have been demonstrated in the majority of

those who recover from COVID-19 even in the absence of detectable circulating antibodies 9. Moreover,

the detection of T cells that are specific for the original SARS-CoV nucleoprotein in patients years after

infection highlights the potential role of T cells in generating long lasting immunity against the virus 7. A

mass cytometry based peptide-MHC-tetramer staining strategy 17 was applied, whereby 408 SARS-CoV-2

candidate epitopes were screened spanning 6 different HLA alleles. This enabled an ex vivo identification

and true phenotypic characterization of virus-specific T cells in COVID-19 convalescent individuals without

an in-vitro culture or stimulation bias which could affect the cellular phenotype, in contrast to prior studies

using overlapping peptide pools 6–8. The high detection rate of SARS-CoV-2-specific CD8+ T cells across

these COVID-19 convalescent donors is consistent with previous reports 6–8. In addition to the detection of

epitopes previously described by others, over a third (i.e. 35%) of the antigen-specific T cells identified here

have not been previously reported (Table S6), thereby highlighting the sensitivity of the adopted screening

approach 8,9,22–27. However, given the low frequencies of many of these CD8 T+ cells, it is possible that

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these were below the detection threshold since T cell counts are very low in acutely infected patient

samples 28. The T cell response in our study was directed against the full SARS-CoV-2 proteome with the

majority of CD8+ T cells targeting epitopes derived from internal and/or non-structural virus proteins, which

is in agreement with the recent findings by others 8. Moreover, half of the high-prevalence response hits

identified for each HLA comprised antigens derived from non-structural proteins. In total, 12 highly-

prevalent SARS-CoV-2 specific CD8+ T cell responses were identified, several of which overlapped with

the immunodominant peptides detected by others 8, while some differed by the HLA type or the viral

proteins that were assessed. The overall breadth and magnitude of the SARS-CoV-2-specific CD8+ T cell

response may depend on the viral load, the severity of the disease and the intensity of the priming during

the acute phase of the disease. Therefore, our collective findings support inclusion of a broad repertoire of

SARS-CoV-2 epitopes in future vaccine designs 8.A unique phenotype for SARS-CoV-2-specific T cells was

observed that was distinct from other common virus-specific T cells detected in the same cross-sectional

sample. In particular, an enrichment in cells with a stem-cell and transitional memory phenotype was

observed as compared to total and other virus-specific T cells. The inclusion of CD27, CD28 and CD95 in

the evaluation of T cell differentiation states facilitates a granular characterization of T cell progression and

reveals memory and effector capabilities of these cells. In addition, we observed a broad expression of

CD127 across all hits detected, inferring proliferative functionality. A similar early differentiated memory

phenotype has recently been described for SARS-CoV-2-specific T cells, and was further characterized by

polyfunctionality and proliferative capacity 9,29. The potential of TSCM to differentiate into various T cell

memory subsets might contribute to durable protection against SARS-CoV-2 in COVID-19 convalescent

donors. However, Kared et al., recently showed that an alteration in the Wnt signaling affects the

differentiation capabilities of TSCM in older patients 30.

In the current study, no significant impact of age was observed on the quantity or quality of SARS-CoV-2-

specific T cells. The potential role of TSCM in SARS-CoV-2 immune protection remains to be assessed in

larger cohorts with longitudinal follow-up studies. Higher T cell frequencies were observed in high-

prevalence epitope responses, and an increased expression of late differentiation markers (CD57,

Granzyme B) vs. early differentiation markers (CCR7) was observed in high- versus low-prevalence epitope

responses, respectively. Overall, the increased expression of markers associated with T cell differentiation

correlated with the frequencies of SARS-CoV-2-specific T cells detected in this cross-sectional sample. The

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evolving profiles of epitope-specific responses during the resolution phase of the disease suggest a

continuous proliferation and dynamic differentiation of TSCM into effector memory CD8+ T cells. Previous

studies described an activated phenotype across SARS-CoV-2-specific T cells during acute COVID-19

infection 9, which was not consistently observed in our cross-sectional sample. The quiescent phenotype

observed in our study may be a consequence of down-regulated activation after viral clearance,

homeostatic proliferation associated with the resolution of inflammation, or a combination of both. Indeed,

while there was a decrease in inflammation in this cross-sectional sample over time, the expansion and

progressive differentiation of a broad and functional SARS-CoV-2-specific T cell response correlated with

the neutralizing antibody activity and donor recovery time. Our findings bring new insights into the viral

targets and dynamics of the SARS-COV-2-specific CD8+ T cell response. Nevertheless, it remains to be

investigated whether a T cell response to a broad diversity of epitopes is relevant at the early and acute

stages of the disease, and whether they have a protective role at the primary site of infection, as observed

in influenza virus induced respiratory disease 31. Likewise, it will be important to better understand the

phenotypic kinetics of SARS-CoV-2 specific T cells and their contribution to long-term protection.

This study has limitations. Foremost is the relatively small sample size. The need to generate a well

characterized sample set, limited the number of subjects that could be included. Second, the study is

confined to a sampling of COVID-19 convalescent individuals from the greater Baltimore/Washington DC

area. As such, this is a geographically restricted population and may not be broadly representative. Third, a

low proportion of those who were evaluated had been hospitalized. While this limited our ability to

investigate T cell responses in those who were severely ill, it has afforded insight into those with milder

disease, which is a more commonly encountered form of COVID-19 and could alternatively be considered a

strength of our study. Fourth, while the HLA types which were included account for ~73% of the continental

US population, the technology was restricted to only six HLA types. Lastly, the study was cross-sectional

and restricted to a relatively narrow time period. Specifically, individuals were evaluated 27-62 days post-

symptom resolution. At a minimum, they needed to be at least 28 days post-resolution to donate samples.

This limits the conclusions with respect to earlier and/or later in the convalescent period. Of note, even

within the period that was evaluated, changes in the T cell and cytokine responses were observed over

time. For example, those later in the convalescent period exhibited T cell maturation with effector cells

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remaining, possibly to clear residual infection. This is consistent with the cytokine data, demonstrating a

time effect since diagnosis.

To our knowledge, this is the most comprehensive and precise characterization of SARS-CoV-2-specific

CD8+ T cell epitope recognition and corresponding ex vivo T cell phenotypes in COVID-19 convalescent

subjects to date. The discovery of hitherto undescribed SARS-CoV-2 T cell specificities, their unbiased

phenotypic evaluation, and their correlation with the overall inflammation greatly extends the current

understanding about natural immunity to SARS-CoV-2. Knowing the combination of epitope targets and T

cell profiles capable of differentiating into long-term mediators of protection may be pivotal for triggering a

durable immune response. Based on these findings, it seems prudent to include several internal and non-

structural viral proteins in the rational design of a second-generation multivalent vaccine.

Methods

Sample selection, antibody titers, HLA typing and cytokine testing

The study samples were collected from individuals who were at least 18 years old, who had recovered from

COVID-19, and expressed a willingness to donate COVID-19 convalescent plasma (CCP). In order to

qualify for CCP donation, individuals had to have a history of COVID-19 as confirmed by a molecular test

(e.g. nasopharyngeal swab) for SARS-CoV-2 and meet all eligibility criteria for community blood donation

(e.g. not having been pregnant within the six weeks prior to donation, no history or socio-behavioural risk

factors for the major transfusion transmissible infections e.g. HIV, hepatitis B and C) 3. Eligible individuals

were enrolled in the study under full, written informed consent, after which whole blood (25 mL) samples

were collected. The samples were separated into plasma and peripheral blood mononuclear cells (PBMC)

within 12 hours of blood collection. Aliquots of plasma and PBMC were stored at -80˚C until further

processing.

A subset of convalescent individuals was selected for evaluating SARS-CoV-2 specific CD8+ T cells using

highly multiplexed mass cytometry. Among the first 118 eligible CCP donors, there were 87 individuals with

at least four vials of PBMCs collected (each vial contains at least 5 million PBMCs). These individuals were

grouped into tertiles (high, medium and low IgG titers) according to overall anti-SARS-CoV-2 IgG titers

based on EuroImmun ELISA results against SARS-CoV-2 3 (Table S2). Fifteen individuals were randomly

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selected from each tertile for HLA typing using the donor PMBC samples. HLA-A and -B loci were tested

from genomic DNA by next generation sequencing using the TruSight HLA v1 Sequencing Panel,

CareDx®, South San Francisco, CA. Individuals matched for ≥2 HLA-A or B alleles (HLA-A*01:01, HLA-

A*02:01, HLA-A*03:01, HLA-A*11:01, HLA-A*24:02 and HLA-B*07:02) were included in the subsequent

analyses. The remainder of individuals matched for one HLA-A or B allele were randomly selected so that

each tertile group comprised ten different donors (total n=30).

The 30 donor samples were transferred to ImmunoScape from JHU in the form of cryopreserved PBMCs.

Each sample consisted of either one or two aliquots with an average cell number of 12.15 million cells and

a viability above 95% per donor. Samples were thawed at 37°C and immediately transferred into complete

RPMI medium (10% hiFCS, 1% penicillin/streptomycin/glutamine, 10mM HEPES, 55µM 2-mercaptoethanol

(2-ME) supplemented with 50 U/ml Benzonase (Sigma). Aliquots derived from the same donors were

combined and all samples were enriched for T cells by removing CD14 and CD19 expressing cells using a

column-based magnetic depletion approach according to the manufacturer’s recommendations (Miltenyi).

Healthy donor PBMCs (STEMCELL) matched for at least one of the donor HLA alleles were included in

each experiment as control for specific T cell identification.

SARS-CoV-2 neutralizing antibody (nAbs) titers against 100 50% tissue culture infectious doses (TCID50)

per 100 uL were determined using a microneutralization (NT) assay, as previously described 3. The nAb

titer was calculated as the highest plasma dilution that prevented cytopathic effect (CPE) in 50% of the

wells tested. nAb area under the curve (AUC) values were estimated using the exact number of wells

protected from infection at every plasma dilution.

Highly sensitive, multiplexed sandwich immunoassays using MULTI-ARRAY® electrochemiluminescence

detection technology (MesoScale Discovery, Gaithersburg, MD, USA) were used

for the quantitative evaluation of 35 different human cytokines and chemokines in plasma samples from

eligible CCP donors [IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α, GM-CSF, IL-1α, IL-5,

IL-7, IL-12/IL23p40, IL-15, IL-16, IL-17A, TNF-β, VEGF-A, Eotaxin, MIP-1β, Eotaxin-3, TARC, IP-10, MIP-

1α, MCP-1, MDC, MCP-4, IL-18, IL-1RA, G-CSF (CSF3), IFN-α2a, IL-33 and IL-21]. Cytokine and

chemokine concentrations were calculated per manufacturer protocol (MSD DISCOVERY WORKBENCH®

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analysis software) and were considered “detectable” if both runs of each sample had a signal greater than

the analyte- and plate-specific lower limit of detection (LLOD) (i.e., 2.5 standard deviations of the plate-

specific blank). Cytokine and chemokine concentrations (pg/mL) from both runs of each analyte were

averaged.

Peptides

A total of 408 unique SARS-CoV2 candidate peptide epitopes spanning six HLAs (HLA-A*01:01, HLA-

A*02:01, HLA-A*03:01, HLA-A*11:01, HLA-A*24:02 and HLA-B*07:02) were selected based on recent

predictions 14,15 (Table S3). For each of the HLA alleles tested, up to 20 different control peptides (SARS-

CoV-2 unrelated epitopes) were also included into the screenings (Table S3). All peptides were ordered

from Genscript (China) or Mimotopes, (Australia) with a purity above 85% by HPLC purification and mass

spectrometry. Lyophilized peptides were reconstituted at a stock concentration of 10 mM in DMSO.

Antibody staining panel setup

Purified antibodies lacking carrier proteins (100 μg/antibody) were conjugated to DN3 MAXPAR chelating

polymers loaded with heavy metal isotopes following the recommended labelling procedure (Fluidigm). A

specific staining panel was set up consisting of 28 antibodies addressing lineage, phenotypic and functional

markers (Table S5). All labelled antibodies were titrated and tested by assessing relative marker

expression intensities on relevant immune cell subsets in PBMCs from healthy donors (STEMCELL).

Antibody mixtures were prepared freshly and filtered using a 0.1 mM filter (Millipore) before staining.

Tetramer multiplexing setup

To screen for SARS-CoV-2-specific CD8+ T cells we set up a three-metal combinatorial tetramer staining

approach as described previously 17,32. Briefly, specific peptide-MHC class I complexes were generated by

incubating biotinylated UV-cleavable peptide HLA monomers in the presence of individual antigen

candidates. For the generation of a triple-coded tetramer staining mixture recombinant streptavidin was

conjugated to heavy metal loaded DN3 polymers 17 and three out of 12 differently labelled streptavidin

molecules were randomly combined by using an automated pipetting device (TECAN) resulting in a total of

220 unique possible combinations to encode single peptide candidates. Peptide exchange was performed

at 100μg/mL of HLA monomer in PBS with 50μM peptides of interest in a 96-well plate. Peptides with

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similar sequences were assigned the same triple code to avoid multiple signals through potential T cell

cross-reactivity. According to the donors’ HLA genotypes, total epitope screenings ranged from 49 to 220

peptides for individual samples, including SARS-CoV-2 unrelated control peptides. For tetramerization,

each triple coded streptavidin mixture was added in three steps to their corresponding exchanged peptide–

MHC complexes to reach a final molar ratio of 1:4 (total streptavidin:peptide–MHC). The tetramerized

peptide–MHC complexes were incubated with 10μM of free biotin (SIGMA) to saturate remaining unbound

streptavidins. All tetramers were combined and concentrated (10 kDa cutoff filter) in cytometry buffer (PBS,

2% fetal calf serum, 2 mM EDTA, 0.05% sodium azide) before staining the cells. As internal control and to

facilitate the detection of bona fide antigen-specific T cells we generated a second tetramer staining

configuration for each experiment using a completely different coding scheme for each peptide 17.

Sample staining and acquisition

T cell enriched donor samples and healthy donor PBMCs were split into two fractions and seeded at equal

numbers in two wells of a 96 well plate. Cells were washed and each well was then stained with 100ul of

either one of the two tetramer configurations for 1h at RT. After 30 mins a unique metal (Cd-111 and Cd-

113) labelled anti-CD45 antibody was added into each of the wells to further barcode the cells that were

stained with the different tetramer configurations. Cells were then washed twice and the two wells per

sample were combined and stained with the heavy metal labelled antibody mixtures for 30 mins on ice and

200 μM cisplatin during the last 5 mins for the discrimination of live and dead cells. Cells were washed and

fixed in 2% paraformaldehyde in PBS overnight at 4°C. For intracellular staining, cells were incubated in 1x

permeabilization buffer (Biolegend) for 5 min on ice and incubated with metal conjugated anti-GranzymeB

antibodies for 30 min on ice. Samples from different donors were barcoded with a unique dual combination

of bromoacetamidobenzyl-EDTA (Dojindo)-linked metal barcodes (Pd-102, Pd-104, PD106 and PD108,

and Pd-110) for 30 min on ice. Cells were then washed and resuspended in 250 nM iridium DNA

intercalator (Fuidigm) in 2% paraformaldehyde/PBS at RT. Cells were washed, pooled together and

adjusted to 0.5 million cells per ml H2O together with 1% equilibration beads (EQ Four element calibration

beads, Fluidigm) for acquisition on a HELIOS mass cytometer (CyTOF, Fluidigm).

Data analysis

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After mass cytometry acquisition, signals for each parameter were normalized based on EQ beads

(Fluidigm) added to each sample 33 and any zero values were randomized using a custom Rscript that

uniformly distributes values between minus-one and zero. Each sample was manually de-barcoded

followed by gating on live CD8+ and CD4+ T cells (CD45+ DNA+ cisplatin- CD3+ cells) from either staining

configuration after gating out residual monocytes (CD14) and B cells (CD19) using FlowJo (Tree Star Inc)

software. Antigen-specific triple tetramer positive cells (hits) were identified by an automated peptide-MHC

gating method 17 and each hit was confirmed and refined using manual gating. The designation of bona fide

antigen-specific T cells was further dependent on (i) the detection cut-off threshold (≥2 events to be

detected in each staining configuration), (ii) the frequency correspondence between the two tetramer

staining configurations (ratio between the frequencies of a hit in either staining configuration to be ≤2) and

(iii) the background noise (frequencies of specific CD8 T+ cell events must be greater than events from the

corresponding CD4 T cell population), as unbiased objective criteria for antigen-specificity assessment 16.

Bulk T cells and true hits from both staining configurations were combined for assessing frequencies,

phenotypic and statistical analysis.

Frequency values were calculated based on the percentage of the parent immune cell population.

Phenotypic markers were gated individually for each sample and calculated as % of positive cells. High-

dimensional phenotypic profiles and sample distributions were shown using uniform manifold approximation

and projection 34 and Phenograph for automated cell clustering 35. Data analysis was performed using

CYTOGRAPHER®, immunosCAPE’s cloud based analytical software, custom R-scripts, GraphPad Prism

and Flowjo software.

Statistical analysis

Comparative analyses of frequencies of cell subsets and marker expression between samples were done

using Wilcoxon rank sum tests, extended to Kruskall-Wallis tests by ranks for more than 2 levels in a

grouping variable; resulting p-values were adjusted for multiple testing using the Benjamini-Hochberg

method to control the false discovery rate. Correlations were calculated with the Spearman’s rank-order

test. A correlation matrix was calculated comparing phenotypic and serological marker variables in a

pairwise fashion, using the corr.test function from the psych CRAN package; the corrplot package was

subsequently used to graphically display the correlation matrix. Resulting p-values were adjusted for

multiple testing using the Bonferroni method. Spearman’s correlation coefficients were indicated by a heat

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scale whereby blue color shows positive linear correlation, and red color shows negative linear correlation.

All statistical analyses were performed using GraphPad Prism and R and statistical significance was set at

a threshold of *p < 0.05, **p < 0.01, and ***p < 0.001.

Acknowledgements: The authors would like to thank the CCP study and laboratory teams, and all the

donors for the generous participation in the study. We thank the National Institute of Infectious Diseases,

Japan, for providing VeroE6TMPRSS2 cells and acknowledge the Centers for Disease Control and

Prevention, BEI Resources, NIAID, NIH for SARS-Related Coronavirus 2, Isolate USA-WA1/2020, NR-

5228.

Funding: This work was supported in part by National Institute of Allergy and Infectious Diseases (NIAID)

R01AI120938, R01AI120938S1 and R01AI128779 (A.A.R.T); NIAID AI052733, N272201400007C) and

AI15207 (A.C.); NIAID T32AI102623 (E.U.P.); the Division of Intramural Research, NIAID, NIH (O.L., A.R.,

T.Q.); National Heart Lung and Blood Institute 1K23HL151826-01 (E.M.B) and R01HL059842 (A.C.).

Bloomberg Philanthropies (A.C.); Department of Defence W911QY2090012 (D.S.).

Competing interests:

H.K., H.S., F.K., D.C., B.A., A.N., E.W.N., and M.F. are shareholders and/or employees of ImmunoScape

Pte Ltd. A.N. is a Board Director of ImmunoScape Pte Ltd.

Contributions:

Contributed samples – E.B., A.T., D.S., S.S.

Collected experimental data – T.B., K.L, A.P, H.S., F.K., M.B. and M.F.

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Analysed data and performed statistical analysis H.K. D.C., E.P. and M.F.

Drafted the manuscript H.K., B.A.,E.W.N., A.N. and M.F.

Conceived and designed the study: B.A., E.W.N., A.N., MF., A.T., A.R., E.B. and T.Q.

All authors contributed intellectually and approved the manuscript

Figure Legends

Figure 1. Identification and characterization of SARS-CoV-2-specific CD8+ T cells from SARS-CoV-2

convalescent donors. A) Visualization and schematic overview of the experimental workflow. SARS-CoV-

2-specific CD8+ T cells were identified and simultaneously characterized in PBMCs from convalescent

donors by screening a total of 408 SARS-CoV-2 candidate epitopes across six HLAs using a mass

cytometry based highly multiplexed tetramer staining approach. Frequencies and phenotypic profiles of

SARS-CoV-2-specific T cells were associated and correlated with the cross-sectional sample-specific

humoral response and inflammation parameters. B) Representative staining and screening example for

SARS-CoV-2-specific CD8+ T cells from a convalescent donor sample. Shown is a screen probing for 145

SARS-CoV-2 candidate antigens (HLA-A02 and HLA01) and 31 SARS-CoV-2 unrelated control antigens.

Healthy donor PBMCs were run in parallel. Red boxes indicate SARS-CoV-2-specific T cell hits. Screening

data shows the values and means from the 2 technical replicates (2 staining configurations). Bona fide

antigen-specific T cells were defined based on different objective criteria set (Methods).

Figure 2. Breadth and magnitude of SARS-CoV-2-specific CD8+ T cells. A) Bar plots summarizing the

absolute numbers of SARS-CoV-2 antigen specificities detected across donors within cross-sectional

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sample. Out of 408 SARS-CoV-2 peptide candidates 52 unique peptide hits were detected. Between 0 and

13 unique hits were detected in each donor sample (five or more hits in >40% of all donors). In total, 132

SARS-CoV-2-specific T cell hits were detected B) Delineation of T cell reactivities against the SARS-CoV-2

proteome. The majority of epitope hits detected derived from non-structural SARS-CoV-2 proteins. Pie

chart displaying the percentages of epitopes detected derived from structural (Nucleocapsid, Spike) and

non-structural (nsp, PLP, ORF3a, others) proteins spanning the full proteome of SARS-CoV-2. C)

Frequencies of SARS-CoV-2 specific T cells reactive with epitopes derived from spike, nucleocapsid and

non-structural proteins. Highest frequencies were detected for T cells targeting peptides from the

nuleocapsid protein. Each dot represents one hit. D) Numbers of epitopes from the different protein

categories detected across all six HLA alleles tested. E) Definition of high- and low-prevalence hits per HLA

allele. Plots showing individual peptide hits for each allele. Each dot represents one hit. High-prevalence

epitope hits are indicated in red and were defined as events detected in at least three donor samples or in

more than 35% of donors for each allele group. F) Comparison of frequencies of SARS-CoV-2 specific T

cell and T cells reactive with influenza, EBV, CMV, or endogenous MART-1 epitopes. The percentage of

SARS-CoV-2 specific T cells was higher for epitopes categorized as high prevalence hits but lower than the

frequencies of T cells reactive with EBV or CMV antigens detected. *p<0.1, **p<0.01, *** p<0.001. Kruskal-

Wallis test. p-values were adjusted for multiple testing using the Benjamini-Hochberg method to control the

false discovery rate.

Figure 3. SARS-CoV-2-specific CD8+ T cells display a unique phenotype and can be categorized

into different subsets. A) Heatmap summarizing the expression frequencies of all phenotypic markers

analyzed among the total pool of SARS-CoV-2-specific and unrelated control antigen-specific CD8+ T cells

detected in the same cross-sectional sample. The majority of SARS-CoV-2 specific T cells clusters

differently from common virus-specific T cells. Antigen-specificities and phenotypic markers were clustered

using Pearson correlation coefficients as distance measure. B) UMAP plot showing the clustering of all

antigen-specific T cells by antigen category. SARS-CoV-2-specific CD8+ T cell occupy the lower region of

the two-dimensional map. Clustering is based on the expression of all phenotypic markers assessed. Each

dot represents one hit. C) Differentiation profiles of SARS-CoV-2-specific CD8+ T cells and common virus

control antigen-specific T cells. Based on the expression of the markers below the bar diagrams, antigen-

specific and total CD8+ T cells were categorized into distinct states of differentiation. SARS-CoV-2-specific

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T cells were enriched in TSCM and TM2 cells. Control virus hits could be separated into distinct subsets

dependent on the target epitope. *p<0.1, **p<0.01, *** p<0.001. Wilcoxon rank sum test. TSCM (stem-cell

memory cells), TM (transitional memory cells), TEMRA (terminal effector memory cells re-expressing

CD45RA), EM (effector memory cells), CM (central memory cells).

Figure 4. Expansion of highly differentiated SARS-CoV2-specific CD8+ T cells in convalescent

donors. A) Boxplots showing differences in the expression of markers between high- and low-prevalence

response hits. High-prevalent response hits showed a higher expression of markers associated with

differentiation. Each dot represents one donor. *p<0.1, **p<0.01, *** p<0.001. Kruskal-Wallis test. p-values

were adjusted for multiple testing using the Benjamini-Hochberg method to control the false discovery rate.

B) UMAP plot showing the relative position of high- and low-prevalence response hits in the high-

dimensional space. Data from 3 donors is shown. C) Scatterplots showing the correlations between SARS-

CoV-2-specific T cell frequencies and differentiation marker expression. The magnitude of antigen-specific

T cells correlated with the expression of markers associated with T cell differentiation. The correlations

were calculated with the Spearman’s rank-order test. Red dots are high prevalence response hits. D)

Correlogramm showing the correlation between all phenotypic markers and frequencies of SARS-CoV-2-

specific T cells. Later stage differentiation markers positively correlated with higher frequency SARS-CoV-

2-specific T cells. Spearman’s correlation coefficients were indicated by a heat scale whereby blue color

shows positive linear correlation, and red color shows negative linear correlation. Only significant

correlations are shown (*p<0.05, p-values were adjusted for multiple testing using the Bonferroni method).

Figure 5. Time-dependent evolution of SARS-CoV-2-specific CD8+ T cell response, inflammation

and humoral immune response A) Correlation matrix showing the associations between frequencies and

phenotypic markers of SARS-CoV-2-specific T cells and serological markers and recovery time (days since

PCR). Spearman correlation (blue: positive correlation, red: negative correlation). *p<0.05, p-values were

adjusted for multiple testing using the Bonferroni method. B) Scatterplots showing the correlations between

marker expression on SARS-CoV-2-specific T cells and neutralizing antibody activity. Higher expression of

markers associated with T cell differentiation was associated with a stronger neutralizing antibody activity.

C) Scatterplots showing the correlations between marker expression on SARS-CoV-2-specific T cells and

recovery time. The expression of markers associated with late stage differentiation correlated with the

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donors’ recovery time (days since last swab PCR positive). Correlations were calculated with the

Spearman’s rank-order test. Red dots indicate high-prevalence response hits.

Supplementary Figure 1. Correlations between antibody titers, cytokines, neutralizing antibody activity

and recovery time in convalescent donor cross-sectional sample

Supplementary Figure 2. Definition of SARS-CoV-2 hit prevalence responses across all HLAs

Supplementary Figure 3. Gating scheme for identification of T cell differentiation states

Supplementary Figure 4. Association of SARS-CoV-2-specific CD8+ T cells with clinical parameters and

epitope categories

Supplementary Figure 5. Numbers of epitopes detected over time

Supplementary Figure 6. Summary model

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A

Figure 1

COVID-19 Convalescent Donors

n=30

SARS-CoV-2

PBMCs

Plasma

specific SARS-CoV-2 peptide candidate

Humoral responseand inflammation

1 12 2

33

Bona fideSARS-CoV-2-specific

CD8+ T cells

Triple code tetramer multiplexing for each peptide

antibody, cytokines, soluble factors

SARS-CoV-2-specific CD8+ T cell response

408 SARS-CoV-2 antigens (6x HLA)28 phenotypic markers

mass cytometry

NT assay, ELISA

Association and correlation

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10

1

10 2

10 3

0 10 1 10 2 10 3

0

10

1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

0 10 1 10 2 10 3

0

10 1

10 2

10 3

Tet-channel 1 Tet-channel 3 Tet-channel 5 Tet-channel 7 Tet-channel 9 Tet-channel 11

Tet-channel 1 Tet-channel 3 Tet-channel 5 Tet-channel 7 Tet-channel 9 Tet-channel 11

Tet-c

hann

el 2

Tet-c

hann

el 4

Tet-c

hann

el 6

Tet-c

hann

el 6

Tet-c

hann

el 8

Tet-c

hann

el 1

0

Tet-c

hann

el 1

2

10 10Tet-c

hann

el 2

Tet-c

hann

el 4

Tet-c

hann

el 8

Tet-c

hann

el 1

0

Tet-c

hann

el 1

2

Convalescent donor sample

HD PBMCs

EBV BRFL-1 CMV pp65 EBV LMP1 CMV pp50CMV pp65 EBV LMP2 Flu NP EBV LMP2 SARS-CoV-2-YLQPRTFLL SARS-CoV-2-PTDNYITTY SARS-CoV-2-HTTDPSFLGRYSARS-CoV-2-GTDLEGNFYSARS-CoV-2-FTSDYYQLYSARS-CoV-2-DTDFVNEFYBULK CD8+ T cells

B

Cov_1

Cov_2

Cov_3

Cov_4

Cov_5

Cov_6

Cov_7

Cov_8

Cov_9

Cov_1

0

Cov_1

1

Cov_1

2

Cov_1

3

Cov_1

4

Cov_1

5

Cov_1

6

Cov_1

7

Cov_1

8

Cov_1

9

Cov_2

0

Cov_2

1

Cov_2

2

Cov_2

3

Cov_2

4

Cov_2

5

Cov_2

6

Cov_2

7

Cov_2

8

Cov_2

9

Cov_3

0

Cov_3

1

Cov_3

2

Cov_3

3

Cov_3

4

Cov_3

5

Cov_3

6

Cov_3

7

Cov_3

8

Contro

l 1

Contro

l 2

Contro

l 3

Contro

l 4

Contro

l 5

Contro

l 6

Contro

l 7

Contro

l 8

Contro

l 9

Contro

l 10

Contro

l 11

Cov_3

9

Cov_4

0

Cov_4

1

Cov_4

2

Cov_4

3

Cov_4

4

Cov_4

5

Cov_4

6

Cov_4

7

Cov_4

8

Cov_4

9

Cov_5

0

Cov_5

1

Cov_5

2

Cov_5

3

Cov_5

4

Cov_5

5

Cov_5

6

Cov_5

7

Cov_5

8

Cov_5

9

Cov_6

0

Cov_6

1

Cov_6

2

Cov_6

3

Cov_6

4

Cov_6

5

Cov_6

6

Cov_6

7

Cov_6

8

Cov_6

9

Cov_7

0

Cov_7

1

Cov_7

2

Cov_7

3

Cov_7

4

Cov_7

5

Cov_7

6

Cov_7

7

Cov_7

8

Cov_7

9

Cov_8

0

Cov_8

1

Cov_8

2

Cov_8

3

Cov_8

4

Cov_8

5

Cov_8

6

Cov_8

7

Cov_8

8

Cov_8

9

Cov_9

0

Cov_9

1

Cov_9

2

Cov_9

3

Cov_9

4

Cov_9

5

Cov_9

6

Cov_9

7

Cov_9

8

Cov_9

9

Cov_1

00

Cov_1

01

Cov_1

02

Cov_1

03

Cov_1

04

Cov_1

05

Cov_1

06

Cov_1

07

Cov_1

08

Cov_1

09

Cov_1

10

Cov_1

11

Cov_1

12

Cov_1

13

Cov_1

14

Cov_1

15

Cov_1

16

Cov_1

17

Cov_1

18

Cov_1

19

Cov_1

20

Cov_1

21

Cov_1

22

Cov_1

23

Cov_1

24

Cov_1

25

Cov_1

26

Cov_1

27

Cov_1

28

Cov_1

29

Cov_1

30

Cov_1

31

Cov_1

32

Cov_1

33

Cov_1

34

Cov_1

35

Cov_1

36

Cov_1

37

Cov_1

38

Cov_1

39

Cov_1

40

Cov_1

41

Cov_1

42

Cov_1

43

Cov_1

44

Cov_1

45

Contro

l 11

Contro

l 12

Contro

l 13

Contro

l 14

Contro

l 15

Contro

l 16

Contro

l 17

Contro

l 18

Contro

l 19

Contro

l 20

Contro

l 21

Contro

l 22

Contro

l 23

Contro

l 24

Contro

l 25

Contro

l 26

Contro

l 27

Contro

l 28

Contro

l 29

Contro

l 301 10-4

1 10-3

1 10-2

1 10-1

1 100

% p

ositi

ve c

ells

Cov_1

Cov_2

Cov_3

Cov_4

Cov_5

Cov_6

Cov_7

Cov_8

Cov_9

Cov_1

0

Cov_1

1

Cov_1

2

Cov_1

3

Cov_1

4

Cov_1

5

Cov_1

6

Cov_1

7

Cov_1

8

Cov_1

9

Cov_2

0

Cov_2

1

Cov_2

2

Cov_2

3

Cov_2

4

Cov_2

5

Cov_2

6

Cov_2

7

Cov_2

8

Cov_2

9

Cov_3

0

Cov_3

1

Cov_3

2

Cov_3

3

Cov_3

4

Cov_3

5

Cov_3

6

Cov_3

7

Cov_3

8

Contro

l 1

Contro

l 2

Contro

l 3

Contro

l 4

Contro

l 5

Contro

l 6

Contro

l 7

Contro

l 8

Contro

l 9

Contro

l 10

Contro

l 11

Cov_3

9

Cov_4

0

Cov_4

1

Cov_4

2

Cov_4

3

Cov_4

4

Cov_4

5

Cov_4

6

Cov_4

7

Cov_4

8

Cov_4

9

Cov_5

0

Cov_5

1

Cov_5

2

Cov_5

3

Cov_5

4

Cov_5

5

Cov_5

6

Cov_5

7

Cov_5

8

Cov_5

9

Cov_6

0

Cov_6

1

Cov_6

2

Cov_6

3

Cov_6

4

Cov_6

5

Cov_6

6

Cov_6

7

Cov_6

8

Cov_6

9

Cov_7

0

Cov_7

1

Cov_7

2

Cov_7

3

Cov_7

4

Cov_7

5

Cov_7

6

Cov_7

7

Cov_7

8

Cov_7

9

Cov_8

0

Cov_8

1

Cov_8

2

Cov_8

3

Cov_8

4

Cov_8

5

Cov_8

6

Cov_8

7

Cov_8

8

Cov_8

9

Cov_9

0

Cov_9

1

Cov_9

2

Cov_9

3

Cov_9

4

Cov_9

5

Cov_9

6

Cov_9

7

Cov_9

8

Cov_9

9

Cov_1

00

Cov_1

01

Cov_1

02

Cov_1

03

Cov_1

04

Cov_1

05

Cov_1

06

Cov_1

07

Cov_1

08

Cov_1

09

Cov_1

10

Cov_1

11

Cov_1

12

Cov_1

13

Cov_1

14

Cov_1

15

Cov_1

16

Cov_1

17

Cov_1

18

Cov_1

19

Cov_1

20

Cov_1

21

Cov_1

22

Cov_1

23

Cov_1

24

Cov_1

25

Cov_1

26

Cov_1

27

Cov_1

28

Cov_1

29

Cov_1

30

Cov_1

31

Cov_1

32

Cov_1

33

Cov_1

34

Cov_1

35

Cov_1

36

Cov_1

37

Cov_1

38

Cov_1

39

Cov_1

40

Cov_1

41

Cov_1

42

Cov_1

43

Cov_1

44

Cov_1

45

Contro

l 11

Contro

l 12

Contro

l 13

Contro

l 14

Contro

l 15

Contro

l 16

Contro

l 17

Contro

l 18

Contro

l 19

Contro

l 20

Contro

l 21

Contro

l 22

Contro

l 23

Contro

l 24

Contro

l 25

Contro

l 26

Contro

l 27

Contro

l 28

Contro

l 29

Contro

l 301 10-4

1 10-3

1 10-2

1 10-1

1 100

1 101

% p

ositi

ve c

ells

38 HLA-A*01:01SARS-CoV-2 peptides

107 HLA-A*02:01SARS-CoV-2 peptides

SARS-CoV-2-PTDNYITTY

HD PBMCs

SARS-CoV-2 Hits

SARS-CoV-2 Hit

HLA-A*01:01 control HitsHLA-A*02:01 control Hits

177 peptide screen

177 peptide screen

detection threshold

detection threshold

38 HLA-A*01:01SARS-CoV-2 peptides

107 HLA-A*02:01SARS-CoV-2 peptides

HLA-A*01:01 control HitsHLA-A*02:01 control Hits

Convalescent donor sample

.CC-BY-ND 4.0 International licenseavailable under a(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made

The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

Page 26: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

Figure 2

A

Epitop

es sc

reene

d

Unique

hits

detec

ted0

100

200

300

400

500

Tota

l nu

mbe

r of

SAR

S-C

oV-2

epi

tope

s

Structural Non-structural0

10

20

30

40

Tota

l Hit

num

ber

Spike

Nucleoca

psid

Non Structu

ral0.001

0.01

0.1

1

% o

f SA

RS-

CoV

-2-s

peci

ficC

D8+

T c

ells

*** ***

Donor

1

Donor

2

Donor

3

Donor

4

Donor

5

Donor

6

Donor

7

Donor

8

Donor

9

Donor

10

Donor

11

Donor

12

Donor

13

Donor

14

Donor

15

Donor

16

Donor

17

Donor

18

Donor

19

Donor

20

Donor

21

Donor

22

Donor

23

Donor

24

Donor

25

Donor

26

Donor

27

Donor

28

Donor

29

Donor

300

2

4

6

8

10

12

Num

ber o

f epi

tope

s de

tect

ed

B

C

408

52

19.42% ORF3a

16.55% PLP

14.29%Nucleo-capsid

12.95% nsp

13.67% Others 23.02%

Spike

Spike

ORF3aPLP Nnsp

OthersAllSpike

ORF3aPLP Nnsp

OthersAllSpike

ORF3aPLP Nnsp

OthersAllSpike

ORF3aPLP Nnsp

OthersAllSpike

ORF3aPLP Nnsp

OthersAllSpike

ORF3aPLP Nnsp

OthersAll0

10

20

30

40

Epito

pes

dete

cted

HLA-A*01:01HLA-A*02:01

HLA-A*03:01

HLA-A*11:01

HLA-A*24:02

HLA-B*07:02

D

YLQPRTFLL

LLYDANYFL

YLYALV

YFL

ALSKGVHFV

LLLDRLNQL

ALWEIQ

QVV

YLATALLT

L

YLDAYNMMI

NLIDSYFVV

VVFLHVTYV0.000.010.020.030.040.05

0.060.080.10

% o

f tot

al C

D8+

T c

ells

KTFPPTEPK

VTNNTFTLK

GVYFASTEK

KLFDRYFKY

KTIQPRVEK

TSFGPLVRK

SASKIITLK

TISLAGSYK0.00

0.01

0.02

0.03

0.04

0.05

% o

f tot

al C

D8+

T c

ells

VVNARLRAK

KTFPPTEPK

RLFRKSNLK

STFNVPMEK

VTNNTFTLK

VVYRGTTTYK

GTHWFVTQR

AGFSLWVYK

AVFDKNLYDK

SAFAMMFVK

TISLAGSYK

GVYFASTEK

SASKIITLK

KTIQPRVEK

0.000

0.005

0.010

0.015

0.025

0.0500.10.20.3

% o

f tot

al C

D8+

T c

ells

NYNYLYRLF

QYIKWPWYI

NYMPYFFTL

VYFLQSINF

YYTSNPTTF

RFDNPVLPF

TYACWHHSI

VYIGDPAQL

0.0000.0010.0020.0030.0040.005

0.51.01.5

% o

f tot

al C

D8+

T c

ells

QPGQTFSVL

RARSVSPKL

SPRWYFYYL

APHGVVFL

IPRRNVATL

RPDTRYVLM0.0000.0010.0020.0030.0040.005

0.050.100.150.200.25

% o

f tot

al C

D8+

T c

ells

E

F

GTDLEGNFY

FTSDYYQLY

PTDNYITTY

HTTDPSFLGRY

DTDFVNEFY

LTDEMIAQY

0.0000.0250.0500.0750.100

0.10.20.20.40.60.8

% o

f tot

al C

D8+

T c

ells

HLA-A*01:01 HLA-A*02:01

HLA-A*03:01 HLA-A*11:01

HLA-A*24:02 HLA-B*07:02

132 total hits

SARS-CoV-2

(High)

SARS-CoV-2

(Low)FLU

EBVCMV

MART-10.001

0.01

0.1

1

10

% o

f tot

al C

D8+

T c

ells

***

****

.CC-BY-ND 4.0 International licenseavailable under a(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made

The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

Page 27: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

Figure 3

CMV

EBV

FLU

MAR7ï�

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.CC-BY-ND 4.0 International licenseavailable under a(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made

The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

Page 28: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

A

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0

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0

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C

0.0001 0.001 0.01 0.1 1 0.0001 0.001 0.01 0.1 1

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.CC-BY-ND 4.0 International licenseavailable under a(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made

The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

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Figure 5

0

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% o

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r=-0.21p=0.0147Spearman

0

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r=-0.26p=0.0024Spearman

0

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The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

Page 30: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

43-77 years old19-40 years old

Female, n=12 Male, n=18

[3.4-19.9] Neutralizing Ab activity [160-836]

[10-20] Neutralizing Ab titer [80-640] [20-80] Neutralizing Ab titer [10-20]

[19.9-160] Neutralizing Ab activity [3.4-19.9]

IgA_OD

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Figure S1A

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.CC-BY-ND 4.0 International licenseavailable under a(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made

The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

Page 31: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

Figure S2

GTDLEGNFY

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The copyright holder for this preprintthis version posted October 8, 2020. ; https://doi.org/10.1101/2020.10.08.330688doi: bioRxiv preprint

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0 10 1 10 2 10 3

CD45RA

Subset NameTEMRA TM2 EM TM1 CM Tscm Naive

0 10 1 10 2 10 3

CD95

0 10 1 10 2 10 3 10 4

CD27

0 10 1 10 2 10 3 10 4

CD28

0 10 1 10 2 10 3 10 4

CD127

Subset NameTEMRA TM2 EM TM1 CM Tscm Naive

0 10 1 10 2 10 3 10 4

CXCR3

0 10 1 10 2 10 3 10 4

CD38

0 10 1 10 2 10 3 10 4

HLA-DR

0 10 1 10 2 10 3 10 4

CD57

Subset NameTEMRA TM2 EM TM1 CM Tscm Naive

0 10 1 10 2 10 3 10 4

CD244

0 10 1 10 2 10 3 10 4

KLRG1

0 10 1 10 2 10 3 10 4

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0

10 1

10 2

10 3

10 4

CD

57

CD27,CD28

0 10 1 10 2 10 3 10 4

CD27

0

10 1

10 2

10 3

10 4

CD

28

Naive

Tscm

0 10 1 10 2 10 3

CCR7

0

10 1

10 2

10 3

CD

95

NO CD27CD28

TM2

0 10 1 10 2 10 3 10 4

CD27

0

10 1

10 2

10 3

10 4

CD

28

0 10 1 10 2 10 3

CD45RA

0

10 1

10 2

10 3

10 4

CD

57

0 10 1 10 2 10 3 10 4

CD127

0

10 1

10 2

10 3

CD

95

Naive/Tscm

CM

TM1TM2

TEMRA EM

Figure S3

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A Figure S4

020406080100

% positive

132 hits

1 (3.4-10)2 (19.9-59.8)3 (100-299.2)4 (360.4-836)

1 (27-39)2 (39-43)3 (43-48)4 (48-62)

CCR7

CD16

CD27

CD28

CD38

CD39

CD45RA

CD45RO

CD56

CD57

CD71

CD95

CD103

CD127

CD160 CD161

CD244

CLA

CXCR3

GranB

HLADR

KLRG1

ï�

ï�

0

2

ï�� ï� 0 5PC1 (29.7% explained var.)

PC2

(10.

5% e

xpla

ined

var

.)

Epitope Prevalence

High

Low

Epitope Prevalence

BP36143_C

ov_GTH

WFVTQ

RP70295_C

ov_TYACW

HH

SIP89892_C

ov_TYACW

HH

SIP97441_C

ov_VVYRG

TTTYKP76378_C

ov_VVFLHVTYV

P16009_Cov_LTD

EMIAQ

YP70295_C

ov_TSFGPLVR

KP70293_C

ov_TISLAGSYK

P43444_Cov_N

YNYLYR

LFP76624_C

ov_LTDEM

IAQY

P43444_Cov_Q

YIKWPW

YIP21431_C

ov_LTDEM

IAQY

P31691_Cov_VTN

NTFTLK

P21431_Cov_VYFLQ

SINF

P20061_Cov_H

TTDPSFLG

RYP20061_C

ov_PTDN

YITTYP89892_C

ov_NYN

YLYRLF

P20750_Cov_R

LFRKSN

LKP70293_C

ov_SASKIITLKP21431_C

ov_NYN

YLYRLF

P21431_Cov_G

TDLEG

NFY

P45611_Cov_PTD

NYITTY

P45611_Cov_SPRW

YFYYLP76624_C

ov_HTTD

PSFLGRY

P21431_Cov_FTSDYYQ

LYP21431_C

ov_PTDN

YITTYP36346_C

ov_YLQPRTFLL

P20061_Cov_LTD

EMIAQ

YP89892_C

ov_KLFDRYFKY

P31691_Cov_KTFPPTEPK

P89892_Cov_Q

YIKWPW

YIP20061_C

ov_FTSDYYQLY

P20061_Cov_KTFPPTEPK

P43444_Cov_LLYDAN

YFLP43444_C

ov_ALWEIQ

QVV

P37228_Cov_VVN

ARLR

AKP70293_C

ov_SAFAMM

FVKP89395_C

ov_HTTD

PSFLGRY

P89395_Cov_PTD

NYITTY

P36143_Cov_SASKIITLK

P21431_Cov_H

TTDPSFLG

RYP43444_C

ov_YLQPRTFLL

P45611_Cov_H

TTDPSFLG

RYP74517_C

ov_HTTD

PSFLGRY

P45611_Cov_FTSDYYQ

LYP44137_C

ov_FTSDYYQLY

P44137_Cov_H

TTDPSFLG

RYP36143_C

ov_KTIQPRVEK

P36143_Cov_R

ARSVSPKL

P36143_Cov_SPRW

YFYYLP51850_C

ov_HTTD

PSFLGRY

P36143_Cov_KTFPPTEPK

P91439_Cov_ALSKG

VHFV

P14870_Cov_YLQ

PRTFLLP74517_C

ov_FTSDYYQLY

P74999_Cov_KTFPPTEPK

P76378_Cov_SPRW

YFYYLP89395_C

ov_FTSDYYQLY

P76624_Cov_FTSDYYQ

LYP21431_C

ov_YYTSNPTTF

P70295_Cov_VTN

NTFTLK

P70295_Cov_KTIQ

PRVEKP48630_C

ov_ALSKGVH

FVP45611_C

ov_RAR

SVSPKLP37621_C

ov_RAR

SVSPKLP48630_C

ov_LLYDANYFL

P91439_Cov_YLATALLTL

P70295_Cov_Q

YIKWPW

YIP70295_C

ov_SPRWYFYYL

P70293_Cov_AVFD

KNLYD

KP98638_C

ov_KTFPPTEPKP76378_C

ov_ALWEIQ

QVV

P20750_Cov_KTFPPTEPK

P37621_Cov_SPRW

YFYYLP51850_C

ov_DTD

FVNEFY

P51850_Cov_FTSDYYQ

LYP51850_C

ov_PTDN

YITTYP51850_C

ov_GTD

LEGN

FYP70295_C

ov_KTFPPTEPKP48630_C

ov_YLQPRTFLL

P91439_Cov_LLLD

RLN

QL

P91439_Cov_ALW

EIQQ

VVP91439_C

ov_YLQPRTFLL

P70295_Cov_N

YNYLYR

LFP89892_C

ov_KTFPPTEPKP37621_C

ov_KTFPPTEPKP37621_C

ov_YLQPRTFLL

P93871_Cov_KTFPPTEPK

P44137_Cov_LLYDAN

YFLP20750_C

ov_LLYDANYFL

P37621_Cov_ALW

EIQQ

VVP97441_C

ov_VTNN

TFTLKP89892_C

ov_VYIGD

PAQL

P20750_Cov_YLQ

PRTFLLP45611_C

ov_QPG

QTFSVL

P70295_Cov_R

FDN

PVLPFP17767_C

ov_LLLDR

LNQ

LP43444_C

ov_ALSKGVH

FVP43444_C

ov_NLID

SYFVVP76378_C

ov_RAR

SVSPKLP97441_C

ov_STFNVPM

EKP76378_C

ov_YLQPRTFLL

P98638_Cov_VTN

NTFTLK

P98638_Cov_KTIQ

PRVEKP36346_C

ov_LLYDANYFL

P17651_Cov_YLQ

PRTFLLP17651_C

ov_LLYDANYFL

P70293_Cov_KTFPPTEPK

P98638_Cov_KLFD

RYFKYP37621_C

ov_APHG

VVFLP44137_C

ov_YLYALVYFLP37621_C

ov_LLYDANYFL

P17767_Cov_YLDAYN

MM

IP37621_C

ov_IPRR

NVATL

P98638_Cov_G

VYFASTEKP93871_C

ov_YLYALVYFLP36346_C

ov_YLYALVYFLP70295_C

ov_RPD

TRYVLMP70293_C

ov_GVYFASTEK

P21431_Cov_N

YMPYFFTL

P51850_Cov_YLQ

PRTFLLP70293_C

ov_VTNN

TFTLKP70293_C

ov_AGFSLW

VYKP74999_C

ov_VTNN

TFTLKP97441_C

ov_KTFPPTEPKP74999_C

ov_QYIKW

PWYI

P76624_Cov_KTFPPTEPK

P89395_Cov_G

TDLEG

NFY

P16009_Cov_H

TTDPSFLG

RYP89395C

ov_DTD

FVNEFY

P16009_Cov_FTSDYYQ

LYP16009_C

ov_PTDN

YITTY

CD16CD56CD160CD244CD57KLRG1CD45RAGranBCD27CD28CXCR3CCR7CD127CD38CD39CD95CD161CD45ROCD103CD71CLAHLADR

TimeNT AUC quartileIgG tertileEpitope PrevalenceProtein Category

Protein CategoryNStrStr

Epitope PrevalenceHighLow

IgG tertile123

NT AUC quartile

Time

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Figure S5

27-37 39-44 47-620

5

10

15

Days since last Swab PCR positive

Num

ber o

f epi

tope

s de

tect

ed *

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Figure S6

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Table S1

Days since swab IgG OD (pos >0.8) IgA OD (pos >4) IgG Avididity IC50 NTAUC NTtiter Sample CCP ID Race Gender Age Hospitalization

2 C16009 white Male 32 no

1 C14870 Hispanic Male 53 no

41 1.9 4.2 4 139.6 80

4.1 618.4 32048 4.5 2.7

4 C20061 white Female 62 no

3 C17767 white Male 28 no

42 6.8 3.6 4 30.1 40

4 10 2037 1.4 2.4

6 C21431 white Male 29 no

5 C20750 mixed/other/unknown Female 68 no

43 4.3 1.8 4.6 19.9 20

3.9 100 8030 3.7 3.1

8 C36143 white Female 77 no

7 C31691 white Female 61 no

51 1.9 8.2 3.1 10 20

3.8 10 2027 0.4 0.4

10 C37228 white Female 50 no

9 C36346 white Male 56 no

33 0.1 0.1 N.A. 3.4 10

3.8 54.7 4037 4.5 3.1

12 C43444 white Male 19 no

11 C37621 white Male 43 no

43 4.7 2.1 3.9 169 160

3.7 3.4 1041 1.4 1.9

14 C45611 white Male 40 no

13 C44137 white Female 31 no

37 2.8 3.2 3.6 30.1 40

4.3 10 2047 0.6 0.3

16 C51850 white Female 61 no

15 C48630 white Male 50 yes (1 day)

42 3.7 2.5 4.4 139.6 80

5.1 541.6 32047 10.5 6

18 C70293 Asian Female 43 no

17 C63869 white Male 32 no

50 1.8 1.7 3.5 6.7 20

4.2 3.4 1057 2.8 0.8

20 C74517 white Male 28 no

19 C70295 white Male 37 no

50 2.3 0.9 4.6 59.8 40

5.1 240.4 16048 7.2 3

22 C76378 white Male 64 no

21 C74999 Asian Male 48 no

40 3.2 1.6 3.9 160 80

5.5 541.6 32035 7.5 9.4

24 C89395 white Male 40 no

23 C76624 Asian Female 19 no

52 5.4 3.7 4.5 460 320

4.1 19.9 2044 2.4 0.5

26 C91439 white Male 63 no

25 C89892 white Male 37 no

47 6.7 8.1 3.9 836 640

3.9 19.9 2039 1.9 3

28 C97441 white Female 40 yes (5days)

27 C93871 mixed/other/unknown Female 27 N.A.

62 10.2 2.4 7.7 360.4 320

4.1 59.8 4039 0.8 1

30 C98638 white Male 38 no

29 C97651 white Female 28 no

32 4.2 1.8 3.4 299.2 160

4.1 10 2053 3.1 1.7

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Sample CCP Number: IgG tertile HLAA01 HLA A02 HLA A03 HLA A11 HLA A24 HLA B071 C20750 2 HLA A02 HLA A112 C17767 3 HLA A02 HLA A033 C16009 3 HLAA014 C45611 2 HLAA01 HLA A03 HLA B075 C76378 2 HLA A02 HLA B076 C31691 3 HLA A037 C37228 3 HLA A02 HLA A118 C98638 2 HLA A039 C43444 1 HLA A02 HLA A24

10 C74517 2 HLAA01 HLA A0211 C89395 1 HLAA0112 C93871 3 HLA A02 HLA A1113 C91439 1 HLA A0214 C51850 2 HLAA01 HLA A0215 C70293 3 HLA A03 HLA A1116 C14870 1 HLA A0217 C37621 3 HLA A02 HLA A03 HLA B0718 C74999 1 HLA A11 HLA A2419 C76624 2 HLAA01 HLA A1120 C70295 1 HLA A03 HLA A24 HLA B0721 C97651 2 HLA A0222 C21431 2 HLAA01 HLA A2423 C89892 3 HLA A03 HLA A2424 C36143 3 HLA A03 HLA A11 HLA B0725 C36346 1 HLA A0226 C44137 3 HLAA01 HLA A0227 C48630 1 HLA A0228 C63869 2 HLA A0229 C97441 1 HLA A1130 C20061 1 HLAA01 HLA A03

Table S2

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Source Protein name Sequence Allele 2 Allele1 Allele 2 Allele 3SARS-CoV-2 3CL TSEDMLNPNY HLA-A*01:01SARS-CoV-2 3CL GTDLEGNFY HLA-A*01:01SARS-CoV-2 Hel VTDVTQLYL HLA-A*01:01 HLA-A*03:01SARS-CoV-2 Hel ATEETFKLSY HLA-A*01:01SARS-CoV-2 Hel TVDSSQGSEY HLA-A*01:01SARS-CoV-2 M VAGDSGFAAY HLA-A*01:01SARS-CoV-2 M ATSRTLSYY HLA-A*11:01 HLA-A*01:01SARS-CoV-2 no S no N FLTENLLLY HLA-A*01:01SARS-CoV-2 no S no N LTGHMLDMY HLA-A*01:01SARS-CoV-2 nsp15 LAMDEFIERY HLA-A*01:01SARS-CoV-2 nsp2 FIDTKRGVY HLA-A*01:01SARS-CoV-2 nsp2 YTERSEKSY HLA-A*01:01SARS-CoV-2 nsp2 NIFGTVYEK HLA-A*03:01 HLA-A*11:01 HLA-A*01:01SARS-CoV-2 nsp4 HTDFSSEIIGY HLA-A*01:01SARS-CoV-2 nsp4 FSAVGNICY HLA-A*01:01SARS-CoV-2 nsp4 FSNSGSDVLY HLA-A*01:01SARS-CoV-2 nsp8 MADQAMTQMY HLA-A*01:01SARS-CoV-2 nsp9 CTDDNALAY HLA-A*01:01SARS-CoV-2 ORF3a protein FTSDYYQLY HLA-A*01:01 HLA-A*24:02SARS-CoV-2 ORF8 protein VVDDPCPIHFY HLA-A*01:01SARS-CoV-2 PLpro LTENLLLY HLA-A*01:01SARS-CoV-2 PLpro PTDNYITTY HLA-A*01:01SARS-CoV-2 PLpro VVDYGARFY HLA-A*01:01SARS-CoV-2 PLpro HTTDPSFLGRY HLA-A*01:01SARS-CoV-2 PLpro ITDVFYKENSY HLA-A*01:01SARS-CoV-2 PLpro FADDLNQLTGY HLA-A*01:01SARS-CoV-2 RdRpol STDVVYRAFDIY HLA-A*01:01SARS-CoV-2 RdRpol FVENPDILRVY HLA-A*01:01SARS-CoV-2 RdRpol ISDYDYYRY HLA-A*01:01SARS-CoV-2 RdRpol VVDKYFDCY HLA-A*01:01SARS-CoV-2 RdRpol STDGNKIADKY HLA-A*01:01SARS-CoV-2 RdRpol DTDFVNEFY HLA-A*01:01SARS-CoV-2 RdRpol YADVFHLY HLA-A*01:01SARS-CoV-2 RdRpol LTNDNTSRY HLA-A*01:01SARS-CoV-2 S WTAGAAAYY HLA-A*01:01SARS-CoV-2 S TSNQVAVLY HLA-A*01:01SARS-CoV-2 S LADAGFIKQY HLA-A*01:01SARS-CoV-2 S LTDEMIAQY HLA-A*01:01SARS-CoV-2 3CL FLVQAGNVQL HLA-A*02:01SARS-CoV-2 3CL FLNRFTTTL HLA-A*02:01SARS-CoV-2 envelope protein SLVKPSFYV HLA-A*02:01SARS-CoV-2 Hel KLSYGIATV HLA-A*02:01SARS-CoV-2 Hel TLVPQEHYV HLA-A*02:01SARS-CoV-2 Hel TYKLNVGDYFV HLA-A*24:02 HLA-A*02:01SARS-CoV-2 M KLLEQWNLV HLA-A*02:01SARS-CoV-2 M TLACFVLAAV HLA-A*02:01SARS-CoV-2 M GLMWLSYFI HLA-A*02:01

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SARS-CoV-2 M GLMWLSYFV HLA-A*02:01SARS-CoV-2 N LLLDRLNQL HLA-A*02:01SARS-CoV-2 N ALNTPKDHI HLA-A*02:01SARS-CoV-2 N LQLPQGTTL HLA-A*02:01SARS-CoV-2 N LALLLLDRL HLA-A*02:01SARS-CoV-2 N RLNQLESKM HLA-A*02:01SARS-CoV-2 N GMSRIGMEV HLA-A*02:01SARS-CoV-2 N RLNQLESKV HLA-A*02:01SARS-CoV-2 N ILLNKHID HLA-A*02:01SARS-CoV-2 N LLLDRLNQL HLA-A*02:01SARS-CoV-2 no S no N KLKDCVMYA HLA-A*02:01SARS-CoV-2 no S no N NLLKDCPAV HLA-A*02:01SARS-CoV-2 no S no N LLSAGIFGA HLA-A*02:01SARS-CoV-2 nsp1 GLVEVEKGV HLA-A*02:01SARS-CoV-2 nsp1 VMVELVAEL HLA-A*02:01SARS-CoV-2 nsp1 TLGVLVPHV HLA-A*02:01SARS-CoV-2 nsp10 YLASGGQPI HLA-A*02:01SARS-CoV-2 nsp14 MLSDTLKNL HLA-A*02:01SARS-CoV-2 nsp14 NLSDRVVFV HLA-A*02:01SARS-CoV-2 nsp14 VLWAHGFEL HLA-A*02:01SARS-CoV-2 nsp14 LLADKFPVL HLA-A*02:01SARS-CoV-2 nsp14 YLDAYNMMI HLA-A*02:01SARS-CoV-2 nsp14 MMISAGFSL HLA-A*02:01SARS-CoV-2 nsp15 SLENVAFNV HLA-A*02:01SARS-CoV-2 nsp15 SQLGGLHLL HLA-A*02:01SARS-CoV-2 nsp15 LLLDDFVEII HLA-A*02:01SARS-CoV-2 nsp16 YLNTLTLAV HLA-A*02:01SARS-CoV-2 nsp16 TLIGDCATV HLA-A*02:01SARS-CoV-2 nsp2 GLNDNLLEIL HLA-A*02:01SARS-CoV-2 nsp2 KLNEEIAII HLA-A*02:01SARS-CoV-2 nsp2 RLIDAMMFT HLA-A*02:01SARS-CoV-2 nsp2 YITGGVVQL HLA-A*02:01SARS-CoV-2 nsp2 KLVNKFLAL HLA-A*02:01SARS-CoV-2 nsp2 ALNLGETFV HLA-A*02:01SARS-CoV-2 nsp4 YLITPVHVM HLA-A*02:01SARS-CoV-2 nsp4 FLPRVFSAV HLA-A*02:01SARS-CoV-2 nsp4 KLIEYTDFA HLA-A*02:01SARS-CoV-2 nsp4 IVAGGIVAI HLA-A*02:01SARS-CoV-2 nsp4 FLAHIQWMV HLA-A*02:01SARS-CoV-2 nsp4 FLLNKEMYL HLA-A*02:01SARS-CoV-2 nsp4 FYLTNDVSF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 nsp4 FLPGVYSVIY HLA-A*02:01SARS-CoV-2 nsp6 ILTSLLVLV HLA-A*02:01SARS-CoV-2 nsp6 WLDMVDTSL HLA-A*02:01SARS-CoV-2 nsp6 TLMNVLTLV HLA-A*02:01SARS-CoV-2 nsp6 SMWALIISV HLA-A*02:01SARS-CoV-2 nsp6 MFLARGIVF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 nsp6 FLLPSLATV HLA-A*02:01

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SARS-CoV-2 nsp7 VLLSVLQQL HLA-A*02:01SARS-CoV-2 nsp7 KLWAQCVQL HLA-A*02:01SARS-CoV-2 nsp8 ALWEIQQVV HLA-A*02:01SARS-CoV-2 nsp9 ALLSDLQDL HLA-A*02:01SARS-CoV-2 ORF10 protein NVFAFPFTI HLA-A*02:01SARS-CoV-2 ORF3a protein ALSKGVHFV HLA-A*02:01SARS-CoV-2 ORF3a protein TVYSHLLLV HLA-A*02:01SARS-CoV-2 ORF3a protein YLYALVYFL HLA-A*02:01SARS-CoV-2 ORF3a protein LLYDANYFL HLA-A*02:01SARS-CoV-2 ORF6 protein HLVDFQVTI HLA-A*02:01SARS-CoV-2 ORF7a protein KLFIRQEEV HLA-A*02:01SARS-CoV-2 ORF8 protein QYIDIGNYTV HLA-A*02:01SARS-CoV-2 PLpro YLKLTDNVYIK HLA-A*02:01 HLA-A*03:01SARS-CoV-2 PLpro YLFDESGEFKL HLA-A*02:01 HLA-A*24:02SARS-CoV-2 PLpro FLKKDAPYI HLA-A*02:01SARS-CoV-2 PLpro TLNDLNETL HLA-A*02:01SARS-CoV-2 PLpro YLDGADVTKI HLA-A*02:01SARS-CoV-2 PLpro YLATALLTL HLA-A*02:01SARS-CoV-2 PLpro YLNSTNVTI HLA-A*02:01SARS-CoV-2 PLpro YVWKSYVHV HLA-A*02:01SARS-CoV-2 PLpro ILLLDQALV HLA-A*02:01SARS-CoV-2 PLpro AYILFTRFF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 PLpro FELDERIDKVL HLA-A*02:01SARS-CoV-2 RdRpol YLPYPDPSRIL HLA-A*02:01 HLA-B*07:02SARS-CoV-2 RdRpol NLIDSYFVV HLA-A*02:01SARS-CoV-2 RdRpol YTMADLVYA HLA-A*02:01SARS-CoV-2 RdRpol SLLMPILTL HLA-A*02:01SARS-CoV-2 RdRpol KIFVDGVPFV HLA-A*02:01SARS-CoV-2 RdRpol RLANECAQV HLA-A*02:01SARS-CoV-2 RdRpol LMIERFVSL HLA-A*02:01SARS-CoV-2 RdRpol MLDMYSVML HLA-A*02:01SARS-CoV-2 S VLNDILSRL HLA-A*02:01 HLA-A*11:01SARS-CoV-2 S YLQPRTFLL HLA-A*02:01SARS-CoV-2 S KIADYNYKL HLA-A*02:01SARS-CoV-2 S SIIAYTMSL HLA-A*02:01SARS-CoV-2 S LLFNKVTLA HLA-A*02:01SARS-CoV-2 S RLDKVEAEV HLA-A*02:01SARS-CoV-2 S RLQSLQTYV HLA-A*02:01SARS-CoV-2 S HLMSFPQSA HLA-A*02:01SARS-CoV-2 S FIAGLIAIV HLA-A*02:01SARS-CoV-2 S KLPDDFTGCV HLA-A*02:01SARS-CoV-2 S ALNTLVKQL HLA-A*02:01SARS-CoV-2 S LITGRLQSL HLA-A*02:01SARS-CoV-2 S RLNEVAKNL HLA-A*02:01SARS-CoV-2 S NLNESLIDL HLA-A*02:01SARS-CoV-2 S KLPDDFMGCV HLA-A*02:01SARS-CoV-2 S SIVAYTMSL HLA-A*02:01SARS-CoV-2 S FIAGLIAIV HLA-A*02:01

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Page 41: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

SARS-CoV-2 S VLNDILSRL HLA-A*02:01SARS-CoV-2 S VVFLHVTYV HLA-A*02:01SARS-CoV-2 3CL AMRPNFTIK HLA-A*03:01SARS-CoV-2 Hel VTDVTQLYL HLA-A*01:01 HLA-A*03:01SARS-CoV-2 Hel KLFAAETLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel YVFTGYRVTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel VVYRGTTTYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel VVNARLRAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel ALKYLPIDK HLA-A*03:01SARS-CoV-2 Hel STLQGPPGTGK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 M RIAGHHLGR HLA-A*03:01SARS-CoV-2 N KSAAEASKK HLA-A*03:01SARS-CoV-2 N KTFPPTEPK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 no S no N MSYYCKSHK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N ITPVHVMSK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N YSYATHSDK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N LLNKEMYLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N RQFHQKLLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N IQITISSFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N IMASLVLAR HLA-A*03:01SARS-CoV-2 nsp1 SLVPGFNEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp10 FAVDAAKAYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 RLISMMGFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 SMMGFKMNY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 VLHDIGNPK HLA-A*03:01SARS-CoV-2 nsp15 IINNTVYTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp15 GLQPSVGPK HLA-A*03:01SARS-CoV-2 nsp16 GVAMPNLYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp16 ALGGSVAIK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp16 KMQRMLLEK HLA-A*03:01SARS-CoV-2 nsp2 NIFGTVYEK HLA-A*03:01 HLA-A*11:01 HLA-A*01:01SARS-CoV-2 nsp2 KTIQPRVEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp2 VTNNTFTLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp2 KVTKGKAKK HLA-A*03:01SARS-CoV-2 nsp2 IIIGGAKLK HLA-A*03:01SARS-CoV-2 nsp2 TLKGGAPTK HLA-A*03:01SARS-CoV-2 nsp2 TFFKLVNKF HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 TIFKDASGK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 ALCTFLLNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 AVLQSGFRK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 nsp4 VYSVIYLYL HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp7 SMQGAVDINK HLA-A*03:01SARS-CoV-2 nsp8 VVIPDYNTYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp8 KLKKSLNVAK HLA-A*03:01SARS-CoV-2 nsp8 TMLFTMLRK HLA-A*03:01SARS-CoV-2 nsp8 ALRANSAVK HLA-A*03:01SARS-CoV-2 nsp9 ALAYYNTTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 ORF3a protein RIFTIGTVTLK HLA-A*03:01 HLA-A*11:01

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Page 42: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

SARS-CoV-2 ORF3a protein SASKIITLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 ORF3a protein ASKIITLKK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro YLKLTDNVYIK HLA-A*02:01 HLA-A*03:01SARS-CoV-2 PLpro TVIEVQGYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro RIDKVLNEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro HVVGPNVNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro AVFDKNLYDK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro AIVSTIQRK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro TISLAGSYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro VVENPTIQK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro ASMPTTIAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro ATAEAELAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro RQVVNVVTTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro VVTTKIALK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro VLSGHNLAK HLA-A*03:01SARS-CoV-2 PLpro KLMPVCVETK HLA-A*03:01SARS-CoV-2 PLpro AVMYMGTLSY HLA-A*03:01SARS-CoV-2 PLpro SLREVRTIKVF HLA-A*03:01SARS-CoV-2 PLpro TTIKPVTYK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 PLpro STFNVPMEK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 RdRpol KVAGFAKFLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol AVAKHDFFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol KLFDRYFKY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol TSFGPLVRK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol TVKPGNFNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol KSAGFPFNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol RLYYDSMSY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol MTNRQFHQK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol ATVVIGTSK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol LVASIKNFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol AIDAYPLTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol LLKDCPAVAK HLA-A*03:01SARS-CoV-2 RdRpol RVYANLGER HLA-A*03:01SARS-CoV-2 RdRpol HLYLQYIRK HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S GVYFASTEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S GVYYHKNNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S TLKSFTVEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S RLFRKSNLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S TLADAGFIK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S ASANLAATK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S VTYVPAQEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S MTSCCSCLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S KVFRSSVLH HLA-A*03:01SARS-CoV-2 S RQIAPGQTGK HLA-A*03:01SARS-CoV-2 S QIYKTPPIK HLA-A*03:01SARS-CoV-2 3CL AVLDMCASLK HLA-A*11:01SARS-CoV-2 3CL VTFQSAVKR HLA-A*11:01SARS-CoV-2 Hel KLFAAETLK HLA-A*03:01 HLA-A*11:01

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Page 43: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

SARS-CoV-2 Hel YVFTGYRVTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel VVYRGTTTYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel VVNARLRAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 Hel STLQGPPGTGK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 Hel SSNVANYQK HLA-A*11:01SARS-CoV-2 M ATSRTLSYY HLA-A*11:01 HLA-A*01:01SARS-CoV-2 M GTITVEELK HLA-A*11:01SARS-CoV-2 N KTFPPTEPK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 N ASAFFGMSR HLA-A*11:01SARS-CoV-2 no S no N MSYYCKSHK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N ITPVHVMSK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N YSYATHSDK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N LLNKEMYLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N RQFHQKLLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N IQITISSFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 no S no N AGFSLWVYK HLA-A*11:01SARS-CoV-2 no S no N AQCFKMFYK HLA-A*11:01SARS-CoV-2 no S no N HLMGWDYPK HLA-A*11:01SARS-CoV-2 no S no N KVKYLYFIK HLA-A*11:01SARS-CoV-2 no S no N LLMPLKAPK HLA-A*11:01SARS-CoV-2 no S no N QTFFKLVNK HLA-A*11:01SARS-CoV-2 no S no N YIATNGPLK HLA-A*11:01SARS-CoV-2 nsp1 SLVPGFNEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp10 FAVDAAKAYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 RLISMMGFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 SMMGFKMNY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp14 ASCDAIMTR HLA-A*11:01SARS-CoV-2 nsp15 IINNTVYTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp15 KTQFNYYKK HLA-A*11:01SARS-CoV-2 nsp16 GVAMPNLYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp16 ALGGSVAIK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp16 SSYSLFDMSK HLA-A*11:01 HLA-A*24:02SARS-CoV-2 nsp16 HSWNADLYK HLA-A*11:01SARS-CoV-2 nsp2 NIFGTVYEK HLA-A*03:01 HLA-A*11:01 HLA-A*01:01SARS-CoV-2 nsp2 KTIQPRVEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp2 VTNNTFTLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp2 STSAFVETVK HLA-A*11:01SARS-CoV-2 nsp2 RVVRSIFSR HLA-A*11:01SARS-CoV-2 nsp2 TFFKLVNKF HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 TIFKDASGK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 ALCTFLLNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 AVLQSGFRK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 nsp4 GAMDTTSYR HLA-A*11:01SARS-CoV-2 nsp4 FSSEIIGYKAI HLA-A*11:01SARS-CoV-2 nsp4 VYSVIYLYL HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp6 SAFAMMFVK HLA-A*11:01SARS-CoV-2 nsp8 VVIPDYNTYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp8 QTMLFTMLR HLA-A*11:01

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Page 44: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

SARS-CoV-2 nsp9 ALAYYNTTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 ORF3a protein RIFTIGTVTLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 ORF3a protein SASKIITLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 ORF3a protein ASKIITLKK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro TVIEVQGYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro RIDKVLNEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro HVVGPNVNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro AVFDKNLYDK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro AIVSTIQRK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro TISLAGSYK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro VVENPTIQK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro ASMPTTIAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro ATAEAELAK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro RQVVNVVTTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro VVTTKIALK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 PLpro TTIKPVTYK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 PLpro STFNVPMEK HLA-A*11:01 HLA-A*03:01SARS-CoV-2 PLpro VVNAANVYLK HLA-A*11:01SARS-CoV-2 PLpro LVSDIDITFLK HLA-A*11:01SARS-CoV-2 PLpro LTAVVIPTK HLA-A*11:01SARS-CoV-2 PLpro STQLGIEFLK HLA-A*11:01SARS-CoV-2 PLpro GTLSYEQFK HLA-A*11:01SARS-CoV-2 PLpro TSNSFDVLK HLA-A*11:01SARS-CoV-2 PLpro TTIAKNTVK HLA-A*11:01SARS-CoV-2 RdRpol KVAGFAKFLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol AVAKHDFFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol KLFDRYFKY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol TSFGPLVRK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol TVKPGNFNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol KSAGFPFNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol RLYYDSMSY HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol MTNRQFHQK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol ATVVIGTSK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol LVASIKNFK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol AIDAYPLTK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol GTSTDVVYR HLA-A*11:01SARS-CoV-2 RdRpol RAFDIYNDK HLA-A*11:01SARS-CoV-2 RdRpol HLYLQYIRK HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S VLNDILSRL HLA-A*02:01 HLA-A*11:01SARS-CoV-2 S GVYFASTEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S GVYYHKNNK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S TLKSFTVEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S RLFRKSNLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S TLADAGFIK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S ASANLAATK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S VTYVPAQEK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S MTSCCSCLK HLA-A*03:01 HLA-A*11:01SARS-CoV-2 S NSASFSTFK HLA-A*11:01

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Page 45: CD8+ T cell responses in convalescent COVID-19 individuals ......2020/10/08  · In addition, a total of 130 T cell hits against common control peptides were detected in these donor

SARS-CoV-2 S TEILPVSMTK HLA-A*11:01SARS-CoV-2 S SSTASALGK HLA-A*11:01SARS-CoV-2 S GTHWFVTQR HLA-A*11:01SARS-CoV-2 Hel TYKLNVGDYFV HLA-A*24:02 HLA-A*02:01SARS-CoV-2 Hel VYIGDPAQL HLA-A*24:02SARS-CoV-2 M YFIASFRLF HLA-A*24:02SARS-CoV-2 N NFKDQVILL HLA-A*24:02SARS-CoV-2 N QFKDNVILL HLA-A*24:02SARS-CoV-2 no S no N TYACWHHSI HLA-A*24:02SARS-CoV-2 no S no N KYTQLCQYL HLA-A*24:02SARS-CoV-2 no S no N IYLYLTFYL HLA-A*24:02SARS-CoV-2 no S no N WSMATYYLF HLA-A*24:02SARS-CoV-2 no S no N VQSTQWSLF HLA-A*24:02SARS-CoV-2 no S no N RYMNSQGLL HLA-A*24:02SARS-CoV-2 no S no N TFTYASALW HLA-A*24:02SARS-CoV-2 no S no N SYFIASFRL HLA-A*24:02SARS-CoV-2 nsp1 SYGADLKSF HLA-A*24:02SARS-CoV-2 nsp14 SYATHSDKF HLA-A*24:02SARS-CoV-2 nsp14 KFTDGVCLF HLA-A*24:02SARS-CoV-2 nsp14 LYLDAYNMM HLA-A*24:02SARS-CoV-2 nsp14 VYKQFDTYNLW HLA-A*24:02SARS-CoV-2 nsp14 DYVYNPFMI HLA-A*24:02SARS-CoV-2 nsp14 TYNLWNTF HLA-A*24:02SARS-CoV-2 nsp15 RYKLEGYAF HLA-A*24:02SARS-CoV-2 nsp16 SSYSLFDMSK HLA-A*11:01 HLA-A*24:02SARS-CoV-2 nsp16 VPYNMRVIHF HLA-B*07:02 HLA-A*24:02SARS-CoV-2 nsp2 TFFKLVNKF HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 FYLTNDVSF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 nsp4 VYSVIYLYL HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 nsp4 NYLKRRVVF HLA-A*24:02SARS-CoV-2 nsp4 YYRSLPGVF HLA-A*24:02SARS-CoV-2 nsp4 MFTPLVPFW HLA-A*24:02SARS-CoV-2 nsp4 VFNGVSFSTF HLA-A*24:02SARS-CoV-2 nsp4 LYQPPQTSI HLA-A*24:02SARS-CoV-2 nsp6 MFLARGIVF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 nsp6 VYMPASWVM HLA-A*24:02SARS-CoV-2 nsp6 MYASAVVLL HLA-A*24:02SARS-CoV-2 nsp6 YDYLVSTQEF HLA-A*24:02SARS-CoV-2 nsp8 TYASALWEI HLA-A*24:02SARS-CoV-2 ORF10 protein AFPFTIYSL HLA-A*24:02SARS-CoV-2 ORF3a protein FTSDYYQLY HLA-A*01:01 HLA-A*24:02SARS-CoV-2 ORF3a protein LYLYALVYF HLA-A*24:02SARS-CoV-2 ORF3a protein VYFLQSINF HLA-A*24:02SARS-CoV-2 ORF3a protein YYQLYSTQL HLA-A*24:02SARS-CoV-2 ORF3a protein PYNSVTSSI HLA-A*24:02SARS-CoV-2 PLpro YLFDESGEFKL HLA-A*02:01 HLA-A*24:02SARS-CoV-2 PLpro AYILFTRFF HLA-A*24:02 HLA-A*02:01SARS-CoV-2 PLpro QGYKSVNITF HLA-A*24:02

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SARS-CoV-2 PLpro DYQGKPLEF HLA-A*24:02SARS-CoV-2 PLpro LYDKLVSSF HLA-A*24:02SARS-CoV-2 PLpro YYTSNPTTF HLA-A*24:02SARS-CoV-2 PLpro YYHTTDPSF HLA-A*24:02SARS-CoV-2 PLpro SYLFQHANL HLA-A*24:02SARS-CoV-2 PLpro YYKKDNSYF HLA-A*24:02SARS-CoV-2 PLpro DYKHYTPSF HLA-A*24:02SARS-CoV-2 PLpro NYMPYFFTL HLA-A*24:02SARS-CoV-2 PLpro FFASFYYVW HLA-A*24:02SARS-CoV-2 PLpro VYANGGKGF HLA-A*24:02SARS-CoV-2 PLpro KMFDAYVNTF HLA-A*24:02SARS-CoV-2 PLpro AYVNTFSSTF HLA-A*24:02SARS-CoV-2 PLpro MYMGTLSYEQF HLA-A*24:02SARS-CoV-2 PLpro TYKPNTWCI HLA-A*24:02SARS-CoV-2 RdRpol HLYLQYIRK HLA-A*24:02 HLA-A*03:01 HLA-A*11:01SARS-CoV-2 RdRpol FYGGWHNML HLA-A*24:02SARS-CoV-2 RdRpol IYNDKVAGF HLA-A*24:02SARS-CoV-2 RdRpol SYFVVKRHTF HLA-A*24:02SARS-CoV-2 RdRpol NFNKDFYDF HLA-A*24:02SARS-CoV-2 RdRpol AYANSVFNI HLA-A*24:02SARS-CoV-2 RdRpol SYEDQDALFAY HLA-A*24:02SARS-CoV-2 S PFFSNVTWF HLA-A*24:02SARS-CoV-2 S RFDNPVLPF HLA-A*24:02SARS-CoV-2 S VYSSANNCTF HLA-A*24:02SARS-CoV-2 S EYVSQPFLM HLA-A*24:02SARS-CoV-2 S YYVGYLQPRTF HLA-A*24:02SARS-CoV-2 S LYNSASFSTF HLA-A*24:02SARS-CoV-2 S NYNYLYRLF HLA-A*24:02SARS-CoV-2 S YFPLQSYGF HLA-A*24:02SARS-CoV-2 S PYRVVVLSF HLA-A*24:02SARS-CoV-2 S VYSTGSNVF HLA-A*24:02SARS-CoV-2 S IYKTPPIKDF HLA-A*24:02SARS-CoV-2 S TYVPAQEKNF HLA-A*24:02SARS-CoV-2 S QYIKWPWYI HLA-A*24:02SARS-CoV-2 S YYHKNNKSW HLA-A*24:02SARS-CoV-2 S RFPNITNLCPF HLA-A*24:02SARS-CoV-2 3CL QPGQTFSVL HLA-B*07:02SARS-CoV-2 3CL SPSGVYQCAM HLA-B*07:02SARS-CoV-2 3CL RPNFTIKGSF HLA-B*07:02SARS-CoV-2 Hel TPHTVLQAV HLA-B*07:02SARS-CoV-2 Hel MPLSAPTL HLA-B*07:02SARS-CoV-2 Hel IPARARVECF HLA-B*07:02SARS-CoV-2 Hel APRTLLTKGTL HLA-B*07:02SARS-CoV-2 Hel RPQIGVVREF HLA-B*07:02SARS-CoV-2 Hel RNPAWRKAVF HLA-B*07:02SARS-CoV-2 Hel IPRRNVATL HLA-B*07:02SARS-CoV-2 M VPLHGTIL HLA-B*07:02SARS-CoV-2 N KFPRGQGVPI HLA-B*07:02

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SARS-CoV-2 N SPRWYFYYL HLA-B*07:02SARS-CoV-2 nsp1 RTAPHGHVM HLA-B*07:02SARS-CoV-2 nsp1 APHGHVMVEL HLA-B*07:02SARS-CoV-2 nsp1 VPHVGEIPVAY HLA-B*07:02SARS-CoV-2 nsp10 VPANSTVLSF HLA-B*07:02SARS-CoV-2 nsp10 HPNPKGFCDL HLA-B*07:02SARS-CoV-2 nsp14 HPTQAPTHL HLA-B*07:02SARS-CoV-2 nsp14 TPAFDKSAF HLA-B*07:02SARS-CoV-2 nsp15 LPVNVAFEL HLA-B*07:02SARS-CoV-2 nsp15 KPVPEVKIL HLA-B*07:02SARS-CoV-2 nsp15 APAHISTI HLA-B*07:02SARS-CoV-2 nsp15 KPRSQMEI HLA-B*07:02SARS-CoV-2 nsp16 VPYNMRVIHF HLA-B*07:02 HLA-A*24:02SARS-CoV-2 nsp16 LPKGIMMNV HLA-B*07:02SARS-CoV-2 nsp16 KPREQIDGYVM HLA-B*07:02SARS-CoV-2 nsp2 QPRVEKKKL HLA-B*07:02SARS-CoV-2 nsp2 MPLKAPKEI HLA-B*07:02SARS-CoV-2 nsp2 APKEIIFL HLA-B*07:02SARS-CoV-2 nsp4 VVPGLPGTIL HLA-B*07:02SARS-CoV-2 nsp4 VPYCYDTNVL HLA-B*07:02SARS-CoV-2 nsp4 RPDTRYVLM HLA-B*07:02SARS-CoV-2 nsp4 TPLIQPIGAL HLA-B*07:02SARS-CoV-2 nsp6 LPFAMGIIAM HLA-B*07:02SARS-CoV-2 nsp8 IPLTTAAKL HLA-B*07:02SARS-CoV-2 nsp8 SPNLAWPLI HLA-B*07:02SARS-CoV-2 nsp9 SPVALRQM HLA-B*07:02SARS-CoV-2 nsp9 TPKGPKVKYL HLA-B*07:02SARS-CoV-2 ORF3a protein IPIQASLPF HLA-B*07:02SARS-CoV-2 ORF3a protein APFLYLYAL HLA-B*07:02SARS-CoV-2 ORF7a protein RARSVSPKL HLA-B*07:02SARS-CoV-2 PLpro APLLSAGIF HLA-B*07:02SARS-CoV-2 PLpro APYIVGDVV HLA-B*07:02SARS-CoV-2 PLpro YPQVNGLTSI HLA-B*07:02SARS-CoV-2 PLpro KPASRELKVTF HLA-B*07:02SARS-CoV-2 PLpro TPSFKKGAKL HLA-B*07:02SARS-CoV-2 PLpro KPANNSLKI HLA-B*07:02SARS-CoV-2 PLpro KKPNELSRVL HLA-B*07:02SARS-CoV-2 PLpro MPYFFTLLL HLA-B*07:02SARS-CoV-2 PLpro TPRDLGACI HLA-B*07:02SARS-CoV-2 PLpro VAKSHNIAL HLA-B*07:02SARS-CoV-2 PLpro NVPMEKLKTL HLA-B*07:02SARS-CoV-2 PLpro TKPVETSNSF HLA-B*07:02SARS-CoV-2 PLpro AEIPKEEVKPF HLA-B*07:02SARS-CoV-2 RdRpol YLPYPDPSRIL HLA-A*02:01 HLA-B*07:02SARS-CoV-2 RdRpol MVPHISRQRL HLA-B*07:02SARS-CoV-2 RdRpol MPILTLTRAL HLA-B*07:02SARS-CoV-2 RdRpol KPYIKWDLL HLA-B*07:02SARS-CoV-2 RdRpol IPTITQMNL HLA-B*07:02

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SARS-CoV-2 S LPFNDGVYF HLA-B*07:02SARS-CoV-2 S TPINLVRDL HLA-B*07:02SARS-CoV-2 S LPQGFSAL HLA-B*07:02SARS-CoV-2 S KPFERDISTEI HLA-B*07:02SARS-CoV-2 S QPYRVVVL HLA-B*07:02SARS-CoV-2 S GPKKSTNLV HLA-B*07:02SARS-CoV-2 S SPRRARSVA HLA-B*07:02SARS-CoV-2 S IPTNFTISV HLA-B*07:02SARS-CoV-2 S APHGVVFL HLA-B*07:02SARS-CoV-2 S SEPVLKGVKL HLA-B*07:02

TAA MSLN TLDTLTAFY HLA-A*01:01TAA Survivin FTELTLGEF HLA-A*01:01TAA WT1 TSEKRPFMCAY HLA-A*01:01CMV UL44 VTEHDTLLY HLA-A*01:01CMV pp65 YSEHPTFTSQY HLA-A*01:01

Hepatitis Polyprotein ATDALMTGY HLA-A*01:01Influenza NP CTELKLSDY HLA-A*01:01

Virus VP1 SADNNNSEY HLA-A*01:01Influenza PB1 VSDGGPNLY HLA-A*01:01

Adenovirus Hexon TDLGQNLLY HLA-A*01:01HCV NS3 ATDALMTGF HLA-A*01:01CMV pp65 NLVPMVATV HLA-A*02:01CMV IE-1 VLEETSVML HLA-A*02:01EBV BALF4 FLDKGTYTL HLA-A*02:01EBV BMLF1 GLCTLVAML HLA-A*02:01EBV BMRF1 TLDYKPLSV HLA-A*02:01EBV BRLF1 YVLDHLIVV HLA-A*02:01EBV EBNA 3B LLDFVRFMGV HLA-A*02:01EBV LMP-2A CLGGLLTMV HLA-A*02:01EBV LMP-1 YLLEMLWRL HLA-A*02:01EBV LMP-1 YLQQNWWTL HLA-A*02:01EBV LMP-2A FLYALALLL HLA-A*02:01

Influenza MP GILGFVFTL HLA-A*02:01Influenza MP ILGFVFTLTV HLA-A*02:01Influenza BNP KLGEFYNQMM HLA-A*02:01Influenza Nucleocapsid LVWMACHSA HLA-A*02:01

HBV Core FLPSDFFPSV HLA-A*02:01TAA MART-1 ELAGIGILTV HLA-A*02:01TAA NY-ESO-1 SLLMWITQC HLA-A*02:01TAA MAGE-A1 KVLEYVIKV HLA-A*02:01TAA MAGE-A3 FLWGPRALV HLA-A*02:01EBV EMNA 3A RLRAEAQVK HLA-A*03:01HPV E6 KLCLRFLSK HLA-A*03:01

Hepatitis Polyprotein VTLTHPITK HLA-A*03:01Cancer BCL-2L1 RIAAWMATY HLA-A*03:01Cancer gp100 ALLAVGATK HLA-A*03:01Cancer HMOX1 QVLKKIAQK HLA-A*03:01Cancer hTERT SVLNYERARR HLA-A*03:01

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Cancer MCL-1 RLLFFAPTR HLA-A*03:01Cancer RhoC RLGLQVRKNK HLA-A*03:01CMV IE-1 KLGGALQAK HLA-A*03:01

Influenza PR8 ILRGSVAHK HLA-A*03:01HCV NS5B RVCEKMALY HLA-A*03:01

Influenza MP SIIPSGPLK HLA-A*11:01Influenza MP1 RMVLASTTAK HLA-A*11:01Influenza MP2 KSMREEYRK HLA-A*11:01

EBV EBNA 3B AVFDRKSDAK HLA-A*11:01EBV EBNA 3B IVTDFSVIK HLA-A*11:01HIV NEF AVDLSHFLK HLA-A*11:01HPV E6 NTLEQTVKK HLA-A*11:01EBV BRLF1 ATIGTAMYK HLA-A*11:01EBV EBNA-4 IVTDFSVIK HLA-A*11:01EBV LMP-2 SSCSSCPLSK HLA-A*11:01HBV core YVNVNMGLK HLA-A*11:01CMV pp65 QYDPVAALF HLA-A*24:01CMV pp65 VYALPLKML HLA-A*24:01CMV IE-1 AYAQKIFKI HLA-A*24:01EBV LMP2 PYLFWLAAI HLA-A*24:01EBV LMP2 TYGPVFMSL HLA-A*24:01EBV BRLF1 DYCNVLNKEF HLA-A*24:01EBV LMP-2 TYGPVFMCL HLA-A*24:01HIV Env RYLKDQQLL HLA-A*24:01HIV Env RYLRDQQLL HLA-A*24:01HIV NEF RYPLTFGWCF HLA-A*24:01HBV Polymerase KYTSFPWLL HLA-A*24:01

Adenovirus Hexon 37-45 TYFSLNNKF HLA-A*24:01HBV core EYLVSFGVW HLA-A*24:01HCV NS3 AYSQQTRGL HLA-A*24:01CMV pp65 RPHERNGFTVL HLA-B*07:02CMV pp65 TPRVTGGGAM HLA-B*07:02EBV BMRF1 RPQGGSRPEFVKLHLA-B*07:02EBV EBNA 3A RPPIFIRRL HLA-B*07:02EBV EBNA 6 QPRAPIRPI HLA-B*07:02HPV E7 KPTLKEYVL HLA-B*07:02Virus VP1 GPLCKADSL HLA-B*07:02Virus VP1 APTKRKGEC HLA-B*07:02Virus VP1 APKKPKEPV HLA-B*07:02Virus VP1 NPTAQSQVM HLA-B*07:02Virus VP1 VPQYGYLTL HLA-B*07:02Virus VP1 SPERKMLPC HLA-B*07:02

Influenza NP SPIVPSFDM HLA-B*07:02Influenza PB1 QPEWFRNVL HLA-B*07:02

Adenovirus Hexon114 KPYSGTAYNAL HLA-B*07:02

Table S3

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HLA-A11 HLA-A01/HLA-A03 HLA-A01/HLA-A03/HLA-B07 HLA-A02/HLA-A03 HLA-A02/HLA-A24 HLA-A02/HLA-B07 HLA-A01/HLA-A24 HLA-11/HLA-A24 HLA-A01/HLA-A11 HLA-A03/HLA-A11/HLA-B07 HLA-A03/HLA-A11 HLA-A02/HLA-A03/HLA-B07 HLA-A03/HLA-A24/HLA-B07 HLA-A03/HLA-A24Allele Peptides Str/NStr Protein P89395 P16009 P97441 P14870 P17651 P36346 P48630 P65869 P91439 P20750 P93871 P37728 P44137 P51850 P74517 P31691 P98638 P20061 P45611 P17767 P43444 P76378 P21431 P74999 P76624 P36143 P70293 P37621 P70295 P89892

HLA-A01 GTDLEGNFY ORF1a/NStr 3CL 0.006 0.001 0.002HLA-A01 FTSDYYQLY NStr ORF3a protein 0.471 0.013 0.022 0.012 0.008 0.03 0.007 0.007 0.019HLA-A01 PTDNYITTY ORF1a/NStr PLpro 0.029 0.015 0.008 0.008 0.015 0.020HLA-A01 HTTDPSFLGRY ORF1a/NStr PLpro 0.285 0.045 0.05 0.067 0.026 0.143 0.124 0.023 0.022HLA-A01 DTDFVNEFY ORF1b/NStr RdRpol 0.007 0.002HLA-A01 LTDEMIAQY Str S 0.004 0.003 0.002 0.002

HLA-A02 YLQPRTFLL Str S 0.068 0.010 0.012 0.023 0.062 0.002 0.001 0.01 0.002 0.006HLA-A02 LLYDANYFL NStr ORF3a protein 0.004 0.006 0.020 0.002 0.003 0.003 0.005HLA-A02 YLYALVYFL NStr ORF3a protein 0.005 0.002 0.003HLA-A02 ALSKGVHFV NStr ORF3a protein 0.006 0.035 0.001HLA-A02 LLLDRLNQL Str N 0.011 0.003HLA-A02 ALWEIQQVV ORF1a/NStr nsp8 0.039 0.006 0.004 0.001HLA-A02 YLATALLTL ORF1a/NStr Plpro 0.004HLA-A02 YLDAYNMMI ORF1b/NStr nsp14 0.002HLA-A02 NLIDSYFVV ORF1b/NStr RdRpol 0.0015HLA-A02 VVFLHVTYV Str S 0.002

HLA-A03 KTFPPTEPK Str N 0.018 0.006 0.017 0.036 0.010 0.007 0.004 0.027HLA-A03 VTNNTFTLK ORF1a/NStr nsp2 0.003 0.002 0.002 0.002HLA-A03 GVYFASTEK Str S 0.001 0.002HLA-A03 KLFDRYFKY ORF1b/NStr RdRpol 0.001 0.001HLA-A03 KTIQPRVEK ORF1a/NStr nsp2 0.001 0.039 0.003HLA-A03 TSFGPLVRK ORF1b/NStr RdRpol 0.001HLA-A03 SASKIITLK NStr ORF3a protein 0.003 0.001HLA-A03 TISLAGSYK ORF1a/NStr PLpro 0.001

HLA-A11 VVNARLRAK ORF1b/NStr Hel 0.002HLA-A11 KTFPPTEPK Str N 0.004 0.012 0.006 0.219 0.011 0.036 0.010HLA-A11 RLFRKSNLK Str S 0.003HLA-A11 STFNVPMEK ORF1a/NStr PLpro 0.003HLA-A11 VTNNTFTLK ORF1a/NStr nsp2 0.003 0.001 0.002HLA-A11 VVYRGTTTYK ORF1b/NStr Hel 0.003HLA-A11 GTHWFVTQR Str S 0.169HLA-A11 AGFSLWVYK ? no S no N 0.001HLA-A11 AVFDKNLYDK ORF1a/NStr PLpro 0.001HLA-A11 SAFAMMFVK ORF1a/NStr nsp6 0.001HLA-A11 TISLAGSYK ORF1a/NStr PLpro 0.001HLA-A11 GVYFASTEK Str S 0.002HLA-A11 SASKIITLK NStr ORF3a protein 0.003 0.001HLA-A11 KTIQPRVEK ORF1a/NStr nsp2 0.039

HLA-A24 NYNYLYRLF Str S 0.002 0.006 0.001HLA-A24 QYIKWPWYI Str S 0.0015 0.006 0.010 0.005HLA-A24 NYMPYFFTL ORF1a/NStr PLpro 0.001 0.002HLA-A24 VYFLQSINF NStr ORF3a protein 0.002HLA-A24 YYTSNPTTF ORF1a/NStr PLpro 0.003HLA-A24 RFDNPVLPF Str S 0.005HLA-A24 TYACWHHSI ? no S no N 0.113 0.001HLA-A24 VYIGDPAQL ORF1b/NStr Hel 0.006

HLA-B07 QPGQTFSVL ORF1a/NStr 3CL 0.001HLA-B07 RARSVSPKL NStr ORF7a protein 0.001 0.003 0.005 0.002HLA-B07 SPRWYFYYL Str N 0.022 0.14 0.141 0.166 0.018HLA-B07 APHGVVFL Str S 0.001HLA-B07 IPRRNVATL ORF1b/NStr Hel 0.002HLA-B07 RPDTRYVLM ORF1a/NStr nsp4 0.001

HLA-A01 CTELKLSDY Flu NP 0.006 0.006HLA-A01 VSDGGPNLY Flu B1 0.106 0.017 0.04 0.009 0.050HLA-A02 GILGFVFTL Flu M1 0.050 0.007 0.050 0.03 0.025 0.045 0.033 0.014 0.071 0.038 0.008HLA-A03 ILRGSVAHK Flu NP 0.038 0.01 0.022 0.015 0.06 0.010 0.138 0.019 0.017 0.001HLA-A11 KSMREEYRK. Flu MP2 0.001HLA-A24 TYQWIIRNW. Flu PB2 0.002HLA-B07 SPIVPSFDM Flu NP 0.001

HLA-A02 TLDYKPLSV EBV BMRF1 0.018 0.003HLA-A02 YLLEMLWRL EBV LMP1 0.013 0.003 0.003 0.007HLA-A02 YVLDHLIVV EBV BRFL1 0.011 0.057 0.034 0.065 0.088 0.007 0.076 0.51HLA-A02 LLDFVRFMGV EBV EBNA 6 0.019 0.033 0.264HLA-A02 CLGGLLTMV EBV LMP2 0.028 0.022 0.172 0.003 0.001 0.05HLA-A02 FLYALALLL EBV LMP2 0.048 0.021 0.029 0.052 0.009 0.005 0.005 0.027 0.003 0.014 0.004 0.011HLA-A03 RLRAEAQVK EBV ENBA 3A 0.042 0.005 0.016 0.004 0.007 0.035 0.004 0.001HLA-A11 SSCSSCPLSK EBV LMP2 0.005 0.006 0.037 0.003 0.048HLA-A11 AVFDRKSDAK EBV ENBA 3B 0.075 0.161 0.005 0.009 0.181 0.320 0.062HLA-A11 IVTDFSVIK EBV ENBA 3B 1.074 0.004 0.255 0.259 0.028HLA-A24 PYLFWLAAI. EBV LMP2 0.002HLA-B07 RPPIFIRRL EBV ENBA 3A 0.11 0.02 0.052 0.367 0.196

HLA-A01 VTEHDTLLY CMV pp50 0.772 1.67 0.306HLA-A01 YSEHPTFTSQY CMV pp65 0.09 0.008 1.797HLA-A02 NLVPMVATV CMV pp65 0.643 0.044 0.63HLA-A02 VLEETSVML CMV IE1 0.493 0.842HLA-A03 KLGGALQAK CMV IE1 0.122HLA-A24 AYAQKIFKI. CMV IE1 0.002 0.001 0.003 0.002HLA-A24 QYDPVAALF CMV pp65 0.017 0.082 0.003 0.053HLA-B07 RPHERNGFTVL CMV pp65 0.951 4.244

HLA-A02 ELAGIGILTV MART-1 0.040 0.035 0.022 0.013 0.015 0.009 0.006 0.005HLA-A01 TDLGQNLLY Adenovirus 0.015 0.004HLA-A24 TYFSLNNKF Adenovirus 0.05

Table S4

HLA-A01 HLA-A02 HLA-A02/HLA-A11 HLA-A01/HLA-A02 HLA-A03

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Metal Antibody Clone ProviderY-89 CD45 HI30 Fluidigm

Cd-112/114 CD14 TUK4 InvitrogenCd-112/114 CD19 SJ25-C1 Life Technologies

ln-115 CD57 HCD57 BiolegendPr-141 CD103 B-Ly7 eBiosciencesNd-142 CD56 NCAM 16.2 BDNd-143 HLA-DR L243 BiolegendNd-144 CD3 UCHT1 BiolegendNd-145 CD4 SK3 BiolegendNd-146 CD8 SK1 BiolegendSm-147 CD45RA HI100 BiolegendNd-148 CD45RO UCLH1 BiolegendSm-149 CD160 MAB6700 R&DNd-150 Granzyme B CLB-GB11 ABCAMSm-152 CD38 HIT2 BiolegendEu-153 KLRG1 13F12F2 eBiosciencesGd-155* CLA HECA-452 BiolegendGd-158 CD27 LG.7F9 eBiosciencesTb-159 CXCR3 MAB160-100 R&DDy-161* CD161 HP-3G10 BiolegendDy-162* CD95 DX2 BiolegendDy-163* CD127 A019D5 BiolegendEr-168 CCR7 150503 R&DEr-170 CD244 C1.7 Biolegend

Yb-173* CD28 CD28.2 BiolegendYb-174 CD71 CY1G4 BiolegendYb-176 CD39 A1 BiolegendBi-209 CD16 3g8 Fluidigm

Table S5

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Allele Peptides Str/NStr Protein T cell responses previously reportedHLA-A01 GTDLEGNFY ORF1a/NStr 3CL Ferretti et al. HLA-A01 FTSDYYQLY NStr ORF3a protein Ferretti et al.; Gangaev et al.; Snyder et al.; Schulien et al. HLA-A01 PTDNYITTY ORF1a/NStr PLpro Ferretti et al.; Gangaev et al.; Snyder et al.HLA-A01 HTTDPSFLGRY ORF1a/NStr PLpro Ferretti et al.; Snyder et al. HLA-A01 DTDFVNEFY ORF1b/NStr RdRpol Ferretti et al.; Gangaev et al.; Snyder et al; Schulien et al. HLA-A01 LTDEMIAQY Str S Snyder et al.; Schulien et al.

HLA-A02 YLQPRTFLL Str S Ferretti et al.; Gangaev et al.; Shomuradova et al.; Snyder et al.; Habel et al. HLA-A02 LLYDANYFL NStr ORF3a protein Ferretti et al.; Sekine et al.; Snyder et al.; Schulien et al. HLA-A02 YLYALVYFL NStr ORF3a protein Snyder et al.; Schulien et al. HLA-A02 ALSKGVHFV NStr ORF3a protein Sekine et al.; Snyder et al. HLA-A02 LLLDRLNQL Str N Ferretti et al.; Sekine et al.; Quadeer et al.; Snyder et al.; Schulien et al. HLA-A02 ALWEIQQVV ORF1a/NStr nsp8 Ferretti et al.; Snyder et al.HLA-A02 YLATALLTL ORF1a/NStr PlproHLA-A02 YLDAYNMMI ORF1b/NStr nsp14 Snyder et al.HLA-A02 NLIDSYFVV ORF1b/NStr RdRpolHLA-A02 VVFLHVTYV Str S Quadeer et al.; Snyder et al.

HLA-A03 KTFPPTEPK Str N Ferretti et al.; Snyder et al. HLA-A03 VTNNTFTLK ORF1a/NStr nsp2HLA-A03 GVYFASTEK Str S Snyder et al. HLA-A03 KLFDRYFKY ORF1b/NStr RdRpolHLA-A03 KTIQPRVEK ORF1a/NStr nsp2 Ferretti et al. HLA-A03 TSFGPLVRK ORF1b/NStr RdRpolHLA-A03 SASKIITLK NStr ORF3a proteinHLA-A03 TISLAGSYK ORF1a/NStr PLpro

HLA-A11 VVNARLRAK ORF1b/NStr HelHLA-A11 KTFPPTEPK Str N Ferretti et al.; Snyder et al. HLA-A11 RLFRKSNLK Str S Snyder et al.HLA-A11 STFNVPMEK ORF1a/NStr PLpro Snyder et al.; Schulien et al. HLA-A11 VTNNTFTLK ORF1a/NStr nsp2HLA-A11 VVYRGTTTYK ORF1b/NStr Hel Schulien et al. HLA-A11 GTHWFVTQR Str S Snyder et al.,HLA-A11 AGFSLWVYK ORF1ab/NStr ORF1abHLA-A11 AVFDKNLYDK ORF1a/NStr PLproHLA-A11 SAFAMMFVK ORF1a/NStr nsp6 Schulien et al. HLA-A11 TISLAGSYK ORF1a/NStr PLproHLA-A11 GVYFASTEK Str S Snyder et al. HLA-A11 SASKIITLK NStr ORF3a proteinHLA-A11 KTIQPRVEK ORF1a/NStr nsp2

HLA-A24 NYNYLYRLF Str S Snyder et al. HLA-A24 QYIKWPWYI Str S Ferretti et al.; Gangaev et al.; Snyder et al. HLA-A24 NYMPYFFTL ORF1a/NStr PLproHLA-A24 VYFLQSINF NStr ORF3a protein Ferretti et al.; Snyder et al.HLA-A24 YYTSNPTTF ORF1a/NStr PLproHLA-A24 RFDNPVLPF Str S Snyder et al.HLA-A24 TYACWHHSI ORF1ab/NStr ORF1abHLA-A24 VYIGDPAQL ORF1b/NStr Hel Ferretti et al.

HLA-B07 QPGQTFSVL ORF1a/NStr 3CLHLA-B07 RARSVSPKL NStr ORF7a protein Snyder et al. HLA-B07 SPRWYFYYL Str N Ferretti et al.; Sekine et al.; Peng et al.; Snyder et al.; Schulien et al HLA-B07 APHGVVFL Str S Snyder et al.HLA-B07 IPRRNVATL ORF1b/NStr Hel Ferretti et al.; Snyder et al.; Schulien et al. HLA-B07 RPDTRYVLM ORF1a/NStr nsp4 Ferretti et al.

Table S6

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