Genetic clues to what triggers MS

... the immune system turns against itself. Genes are only part of the story, however, with other factors, such as vitamin D deficiency or a viral infection, thought to play an important role. The study, carried out by a consortium of international ...

http://www.bbc.co.uk/news/health-14475497#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa