Another study conducted on 450 Spanish patients hospitalized for COVID-19 found that HLA-DRB1*14 was detected more frequently in the severe COVID-19 group than in the mild group.19 Also, Wang et alreported a positive correlation between COVID-19 severity with HLA-DRB1*14 in Chinese patients, but the association was not statistically significant after Bonferroni correction.22 Here, HLA-DRB1 is linked to COVID-19.