CD209 and type 1 diabetes mellitus: Additionally, CD209 SNPs are associated with increased vulnerability to several infectious diseases, including human immunodeficiency virus type 1 (HIV-1),[12] and hepatitis C virus (HCV),[13] which have also been suggested to accelerate autoimmune processes such as RA development.[14] Moreover, CD209 polymorphisms have been linked to type 1 diabetes mellitus[15] and pulmonary tuberculosis.[16]