HLA-A and COVID-19: These residues are among the most common at primary anchor positions P2 (Leu > Thr > Met ~ Val > Ile) and P9 (Val > Ile > Thr > Ala > Cys > Leu) and confer high affinity for HLA-A*02:0147, in agreement with the immunogenicity of RLQ and YLQ in COVID-19 CPs26,33.