CD8A and COVID-19: demonstrated that the striking majority of SARS-CoV-2 CD8+ T-cell epitopes in COVID-19 convalescent subjects is not affected by the mutations found in B.1.1.7 (alpha-VOC), B.1.351, P.1 (gamma-VOC) and B 1.427/B.1.429 (epsilon-variant of interest, VOI) viral strains [50].