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SARS-CoV-2 vaccination induces immunological T cell memory able to cross-recognize variants from Alpha to Omicron
Journal article   Open access   Peer reviewed

SARS-CoV-2 vaccination induces immunological T cell memory able to cross-recognize variants from Alpha to Omicron

A. Tarke, C.H. Coelho, Z. Zhang, J.M. Dan, E.D. Yu, N. Methot, N.I. Bloom, B. Goodwin, E. Phillips, S. Mallal, …
Cell, Vol.185(5), pp.P847-859
2022
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Abstract

We address whether T cell responses induced by different vaccine platforms (mRNA-1273, BNT162b2, Ad26.COV2.S, NVX-CoV2373) cross-recognize early SARS-CoV-2 variants. T cell responses to early variants were preserved across vaccine platforms. By contrast, significant overall decreases were observed for memory B cells and neutralizing antibodies. In subjects ∼6 months post-vaccination, 90% (CD4+) and 87% (CD8+) of memory T cell responses were preserved against variants on average by AIM assay, and 84% (CD4+) and 85% (CD8+) preserved against Omicron. Omicron RBD memory B cell recognition was substantially reduced to 42% compared to other variants. T cell epitope repertoire analysis revealed a median of 11 and 10 spike epitopes recognized by CD4+ and CD8+ T cells, with average preservation > 80% for Omicron. Functional preservation of the majority of T cell responses may play an important role as second-level defenses against diverse variants.

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Citation topics
1 Clinical & Life Sciences
1.104 Virology - General
1.104.1353 Coronavirus Research
Web Of Science research areas
Biochemistry & Molecular Biology
Cell Biology
ESI research areas
Molecular Biology & Genetics
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