HLA-A and COVID-19: To validate the hypothesis that the first wave convalescent HLA-A*01:01 allele carriers had a high number of immunogenic epitopes from ORF1ab proteins, we analyzed the T-cell responses of 28 patients with the history of confirmed COVID-19 during first wave who carried at least one of the two most common alleles in the European population: HLA-A*01:01 (13 patients) and HLA-A*02:01 (15 patients).