HLA-A and COVID-19: In the second study, the authors found that HLA-A*01:01, B*08:01, C*07:01, and DRB1*030:1 were associated with increased incidence and mortality of COVID-19, whereas the HLA-A*02:01-B*18:01-C*07:01-BRB1*11:04 haplotype was associated with lower incidence and mortality [49].