The HLA-A*03:01 allele is considered a risk factor for multiple sclerosis, playing an important role in the initiation phase of the disease [28,29], while the HLA-A*26:01 allele is associated with an increased predisposition for Behcet disease (BD) and the HLA-A*29:02 is involved in a higher susceptibility for autoimmune uveitis [28,29,30,31,32,33]. The gene discussed is HLA-A; the disease is multiple sclerosis.