“…KIR receptors of NK cells may contribute to the occurrence of different immunological and clinical responses to the same disease in a specific population [ 16 ]. Several studies have described the participation of KIR (and their ligands) in infectious diseases, such as AIDS [ 17 , 18 ], hepatitis C [ 19 , 20 ], tuberculosis [ 21 , 22 ], leprosy [ 23 , 24 ] and malaria [ 25 , 26 , 27 ]. KIR are also involved in autoimmune and inflammatory diseases such as pemphigus foliaceus, psoriasis, scleroderma, rheumatoid vasculitis and Crohn’s disease [ 28 , 29 , 30 , 31 , 32 ], as well as in many types of cancer [ 33 – 36 ] and the survival of transplant patients [ 37 ].…”