SARS CoV-2 infections in healthcare workers with a pre-existing T-cell response: a prospective cohort study.

ABSTRACT:

Objective

T-cell responses against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are observed in unexposed individuals. We evaluated the impact of this pre-existing cellular response on incident SARS-CoV-2 infections.

Methods

This was a follow-up study of 38 seronegative healthcare workers (HCWs) with previous evaluation of CD8+ and CD4+ T-cell responses after stimulation with SARS-CoV-2 structural proteins. Infection was considered in the presence of a positive RT-PCR test and/or confirmed seroconversion.

Results

Twenty of the 38 HCWs included (53%) had a previous specific CD8+ T-cell response to peptides encompassing the spike protein (S) in 13 (34%), the membrane (M) in 17 (45%), or/and the nucleocapsid (N) in three (8%). During a follow-up of 189 da

SUBMITTER: Casado JL 

PROVIDER: S-EPMC7923873 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature