susceptibility(4) Analysis(4) Infection(4) Severe acute respiratory syndrome(4) Clinical management(3) Donor(3) Deceased(3) individual(3) immune response(3) disease association studies(3) genetics(3) representing(3) Cohort(3) information(3) Interaction(3) 95% CI(3) human leucocyte antigens(3) tested(3) RNA(3) HLA(3) histocompatibility(3) leucocyte(3) Comparator group(3) pandemic(3) disease association(3) Population(3) HLA frequency(3) Patient(3) protective effect(3) Frequency(3)