ERVW-1 and myeloid sarcoma: Recently we have found a link between EBV and HERV-W, since we showed that the binding in vitro to the plasmamembrane of the EBVgp350 major envelope protein is able to activate the expression of the potentially immunopathogenic and neuropathogenic HERV-Ws in in cells that may be involved in MS pathogenesis (B cells, monocytes, macrophages and astrocytes) [13].