Previous studies from different countries have identified multiple COVID-19 susceptibility-related alleles; for example, Wang et al. identified HLA-B*15:27 alleles from a Chinese population [38], Yung et al. identified serotype B22 (HLA-B*54:01, B*56:01 and B*56:04 alleles) from Hongkong Chinese population [39]. Here, HLA-B is linked to COVID-19.