MULTIPLE SCLEROSIS. “Several viruses have been proposed as co-factors of MS. Among them, there were some members of the family of Herpesviridae, such as the human herpesvirus 6 (HHV-6), and the Epstein- Barr virus (EBV), along with HERV- W/MSRV/syncytin-1.”
http://jidc.org/index.php/journal/article/view/26142666/1316