HLA-B and COVID-19: In particular, studies in the United States associated HLA‐B*15:01 with asymptomatic COVID‐19 in individuals of European ancestry, in which pre‐existing memory T cells cross‐reacted with conserved epitopes from SARS‐CoV‐2 and seasonal coronaviruses (HCoV‐OC43 and HKU1) [38].