Due to the genetic polymorphism of human leukocyte antigens (HLAs), some haplotypes, such as HLA-B*07, HLA-B*46, HLA-DRB1*12, and HLA-Cw *08, were found to be more susceptible to coronavirus infection while the haplotypes HLA-DRB1*03, HLA-A*02, and HLA-Cw *15 were protected against SARS-CoV infection [38]. The gene discussed is HLA-DRB1; the disease is severe acute respiratory syndrome.