Robust T Cell Immunity in Convalescent Individuals with Asymptomatic or Mild COVID-19

SARS-CoV-2-specific memory T cells will likely prove critical for long-term immune protection against COVID-19. Here, we systematically mapped the functional and phenotypic landscape of SARS-CoV-2-specific T cell responses in unexposed individuals, exposed family members, and individuals with acute...

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Bibliographic Details
Authors: Sekine, Takuya, Perez Potti, André, Rivera Ballesteros, Olga, Strålin, Kristoffer, Gorin, Jean Baptiste, Olsson, Annika, Llewellyn Lacey, Sian, Kamal, Habiba, Bogdanovic, Gordana, Muschiol, Sandra, Wullimann, David J., Kammann, Tobias, Emgård, Johanna, Parrot, Tiphaine, Folkesson, Elin, Rooyackers, Olav, Eriksson, Lars I., Henter, Jan Inge, Sönnerborg, Anders, Allander, Tobias, Albert, Jan, Nielsen, Morten, Klingstrom, Jonas, Gredmark Russ, Sara, Björkström, Niklas K., Sandberg, Johan K., Price, David A., Ljunggren, Hans Gustaf, Aleman, Soo, Buggert, Marcus
Format: article
Status:Published version
Publication Date:2020
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/135121
Online Access:http://hdl.handle.net/11336/135121
Access Level:Open access
Keyword:T cell
Sars-Cov-2
Epitope
COVID-19
https://purl.org/becyt/ford/3.3
https://purl.org/becyt/ford/3
Description
Summary:SARS-CoV-2-specific memory T cells will likely prove critical for long-term immune protection against COVID-19. Here, we systematically mapped the functional and phenotypic landscape of SARS-CoV-2-specific T cell responses in unexposed individuals, exposed family members, and individuals with acute or convalescent COVID-19. Acute-phase SARS-CoV-2-specific T cells displayed a highly activated cytotoxic phenotype that correlated with various clinical markers of disease severity, whereas convalescent-phase SARS-CoV-2-specific T cells were polyfunctional and displayed a stem-like memory phenotype. Importantly, SARS-CoV-2-specific T cells were detectable in antibody-seronegative exposed family members and convalescent individuals with a history of asymptomatic and mild COVID-19. Our collective dataset shows that SARS-CoV-2 elicits broadly directed and functionally replete memory T cell responses, suggesting that natural exposure or infection may prevent recurrent episodes of severe COVID-19.

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