Cited by 139SARS-CoV-2 and COVID-19 ResearchImmune responses and vaccinationsCOVID-19 Clinical Research Studies

Disentangling the relative importance of T cell responses in COVID-19: leading actors or supporting cast?

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Kent, Stephen J., Khoury, David S., Reynaldi, Arnold, Juno, Jennifer A., Wheatley, Adam K., Stadler, Eva, John Wherry, E., Triccas, James +3 more·2022·Nature Reviews Immunology

Abstract

The rapid development of multiple vaccines providing strong protection from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has been a major achievement. There is now compelling evidence for the role of neutralizing antibodies in protective immunity. T cells may play a role in resolution of primary SARS-CoV-2 infection, and there is a widely expressed view that T cell-mediated immunity also plays an important role in vaccine-mediated protection. Here we discuss the role of vaccine-induced T cells in two distinct stages of infection: firstly, in protection from acquisition of symptomatic SARS-CoV-2 infection following exposure; secondly, if infection does occur, the potential for T cells to reduce the risk of developing severe COVID-19. We describe several lines of evidence that argue against a direct impact of vaccine-induced memory T cells in preventing symptomatic SARS-CoV-2 infection. However, the contribution of T cell immunity in reducing the severity of infection, particularly in infection with SARS-CoV-2 variants, remains to be determined. A detailed understanding of the role of T cells in COVID-19 is critical for next-generation vaccine design and development. Here we discuss the challenges in determining a causal relationship between vaccine-induced T cell immunity and protection from COVID-19 and propose an approach to gather the necessary evidence to clarify any role for vaccine-induced T cell memory in protection from severe COVID-19.

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  • Multivalent influenza and cytomegalovirus mRNA vaccines have shown that integration of multiple antigens can lead to robust nAb responses in pre-clinical models which correlate with protection for multiple vaccines.

    “Multivalent influenza21 and cytomegalovirus22 mRNA vaccines have shown that integration of multiple antigens can lead to robust nAb responses in pre-clinical models which correlate with protection for multiple vaccines18,23.”

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  1. [36]Cele S Omicron extensively but incompletely escapes Pfizer BNT162b2 neutralization Nature 2021 602 654 656 10.1038/s41586-021-04387-1 35016196 PMC8866126 · DOI · Paper page
  2. [58]Koutsakos M Dynamics of immune recall following SARS-CoV-2 vaccination or breakthrough infection medRxiv 2021 10.1101/2021.12.23.21268285 · DOI
  3. [59]Kared H Immunity in Omicron SARS-CoV-2 breakthrough COVID-19 in vaccinated adults medRxiv 2022 10.1101/2022.01.13.22269213 PMC9293966 35851055 · DOI
  4. [90]Stadler E Determinants of passive antibody effectiveness in SARS-CoV-2 infection medRxiv 2022 10.1101/2022.03.21.22272672 · DOI

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Authors
Kent, S. J., Khoury, D. S., Reynaldi, A., Juno, J. A., Wheatley, A. K., Stadler, E., John Wherry, E., Triccas, J., Sasson, S. C., Cromer, D., & Davenport, M. P.
Affiliations
  • The University of Melbourne (AU)
  • UNSW Sydney (AU)
  • The University of Sydney (AU)
Corresponding author
  • Kent, Stephen J.
  • Davenport, Miles P.
Venue
Nature Reviews Immunology
Published
2022-04-28
Volume
22
Issue
6
Pages
387-397
ISSN
  • 1474-1733 (ISSN-L)
  • 1474-1741
OpenAlex
W4225011156
Cited by
139
References
97
Citations by year
2026: 13 · 2025: 17 · 2024: 26 · 2023: 52 · 2022: 31
FWCI
4.84
Type
journal article
Language
en
Open access
Locations
  • Nature reviews. Immunology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion)
  • The Sydney eScholarship Repository (The University of Sydney) (submittedVersion)
  • UNSWorks (University of New South Wales, Sydney, Australia) (submittedVersion)
Funders
  • National Institutes of Health (AI082630, AI149680, AI108545)
  • National Health and Medical Research Council (1149990, 2007221)
  • National Institute of Allergy and Infectious Diseases (R01AI105343, U19AI149680, R01AI155577, U19AI082630, P01AI108545)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
Keywords
T cell immunity, COVID-19 pandemic, SARS-CoV-2, memory T cells, neutralizing antibodies, vaccine protection, disease severity, SARS-CoV-2 variants, causal inference, vaccine design
MeSH terms
COVID-19, SARS-CoV-2, COVID-19 Vaccines, Humans, Antibodies, Neutralizing

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