Certain alleles, such as HLA-C*01C*03, B*08, A*25, B*44, B*51, and B*15:01, have been positively correlated with the incidence rate of COVID-19, while other alleles, such as HLA-B*18, B*14, and B*49, have shown negative correlation (Figure 8) [65]. The gene discussed is HLA-B; the disease is COVID-19.