The results of each genetic trait analyzed are presented in detail in Supplementary Tables (S1: Allele and Genotype distribution of rs35044562, rs1156361 and rs11549407 in SARS-CoV-2 patients; S2: HLA alleles and Haplotypes frequencies compared between Group A and S; S3: KIR genes and genotype frequencies compared between Group A and S; S4: Comparisons of KIR genes and their cognate HLA ligands between COVID-19 patients between Group A and S). The gene discussed is KIR3DL1; the disease is COVID-19.