A combination of Epstein-Barr virus (EBV) antibodies and genetic factors may be linked to an increased risk of multiple sclerosis (MS), according to a study led by scientists at Karolinska Institutet and Stanford University. “The Epstein-Barr virus has been a suspect for many years for having a role in causing MS. The evidence for it has increased though one has not really reached complete proof of its role,” Tomas Olsson told BioWorld.