Evidence is mounting that multiple sclerosis (MS) may be triggered by one of the most common viruses in the world. The Epstein-Barr virus (EBV) is virtually unavoidable, responsible for what many people refer to as 'kissing disease', otherwise known as infectious mononucleosis or glandular fever . Long after exposure, the virus can lie dormant in the body, hiding even in brain cells. EBV is carried by 95 percent of adults and virtually everyone with MS – a mysterious autoimmune disease that can