Inverse genetic associations with KSHV infection and development of KS were also observed in the context of A*30 (Goedert et al. 2016; Masala et al. 2005), DRB1*04 (Alkharsah et al. 2007; Dorak et al. 2005), and homozygosity of HLA-C1 allotypes (Caselli et al. 2014; Goedert et al. 2016; Guerini et al. 2012). Here, HLA-DRB1 is linked to Kaposi's sarcoma.