Le Bert et al., 2020 showed the presence of T cell responses against the structural (nucleocapsid (N) protein) and non-structural (NSP7 and NSP13 of ORF1) regions of SARS-CoV-2 in individuals convalescing from coronavirus disease 2019 (COVID-19) (Duan et al., 2020; Le Bert et al., 2020). This evidence concerns the gene PROS1 and COVID-19.