Complex sentence: A specific association between MS and the ERVWE1 or'syncytin' gene, which is derived from a HERV insertion, has been reported, along with the presence of an "MS-associated retrovirus" (MSRV) in patients with the disease.
Split into simpler sentences: A specific association between MS and the ERVWE1 or'syncytin' gene, which is derived from a HERV insertion. Some authors have also reported the presence of an "MS-associated retrovirus" (MSRV) in patients with the disease.