Epstein–Barr virus
EBV is best known as the cause of infectious mononucleosis (glandular fever). It is also associated with some forms of cancer, such as Hodgkin's lymphoma, and conditions associated with human immunodeficiency virus (HIV). EBV may be associated with a higher risk of certain autoimmune diseases.  Some 200,000 cancer cases per year may be caused by (or associated with) EBV.