Current publications showed association between autoimmune diseases and chromosome 10p15 region for IL2RA (interleukin 2 receptor-α), chromosome 2q33 region for CTLA-4 (cytotoxic T-lymphocyte antigen-4) and chromosome 2q24 region for IFIH1 (interferon induced with helicase C domain 1) (11, 12). Here, CTLA4 is linked to autoimmune disease.