Autoimmune diseases are strongly associated with enteroviruses such as Coxsackie B virus. Autoimmune diseases are also associated with Epstein-Barr virus, cytomegalovirus, parvovirus B19, and HIV, and the bacterium Mycobacterium tuberculosis. Autoimmune thyroid disease is associated with Epstein-Barr virus and Helicobacter pylori.
Diabetes mellitus type 2 is associated with cytomegalovirus, hepatitis C virus, enteroviruses, and Ljungan virus.