HLA(8) COVID‐19(7) COVID‐19(5) positive(5) SARS‐CoV‐2(5) Genotype(5) coronavirus(5) Patient(4) coronavirus disease(3) susceptibility(3) SARS‐CoV‐2(3) association(3) suggested(3) Pathogenesis(3) Infectious disease(3) Hong Kong(3) COVID-19 vaccination(3) SARS‐CoV‐2 infection(3) donor-specific HLA antibodies(3) Vaccine development(3) COVID-19(3) global pandemic(3) serotype(3) Chinese patient(3) Immunity(3) viral infections(3) Critical(3) caused(3) Infection(3) healthcare(3)