It's looking more and more to me like HHV6 either plays nothing more than a triggering role in MS, or is a red herring.
Brains and peripheral blood mononuclear cells of multiple sclerosis (MS) patients hyperexpress MS-associated retrovirus/HERV-W endogenous retrovirus, but not Human herpesvirus 6.
J Gen Virol. 2007 Jan;88(Pt 1):264-74.
Mameli G, Astone V, Arru G, Marconi S, Lovato L, Serra C, Sotgiu S, Bonetti B, Dolei A.
Section of Microbiology, Department of Biomedical ...