Per our research on the impact of the HLA‐C*12 allele group on susceptibility to disease, a study carried out in Japan involving 137 patients with mild COVID‐19 (mCOVID‐19) and 53 patients with severe COVID‐19 provided evidence suggesting that HLA‐C*12:02:02:01 could be a dependable indicator of disease severity [24]. Here, HLA-C is linked to COVID-19.