Fig 3. Forest plots showing individual and pooled ORs (95% CIs) for the associations between HLA alleles and COVID-19 presence or severity.

(A) Forest plot for HLA-A*30 and COVID-19 presence. (B) Forest plot for HLA-A*33 and COVID-19 severity. (C) Forest plot for HLA-B*38 and COVID-19 severity. (D) Forest plot for HLA-B*06 and COVID-19 severity. ^a Data from an Italian population; ^b Data from a Spanish population.