HLA-C*06:02 (equivalent to HLA-Cw6) was most strongly associated with susceptibility to psoriasis (OR = 3.26; P = 2.1 × 10–201) [36] and is also protective against HIV infection (OR = 2.97; P = 2.1 × 10 –19) [62]. This evidence concerns the gene HLA-C and HIV infectious disease.