Researchers at the Australian National University (ANU) have just published a paper which contains new evident of the link between Ebstein Barr virus and Multiple Sclerosis. They found that individuals with EBV antibodies (ie evidence of past infection), who also exhibit certain genetic predisposing factors, are at 20 times the normal risk of developing MS. The predisposing genetic factors are immunological abnormalities. Various papers (over many years) have linked MS & EBV. This paper provides strong evidence to support that body of research, but also points to the specific mediating role played by the immune system. (Please feel free to correct me if I've got any of that wrong.) Here's the press release from ANU: http://news.anu.edu.au/?p=9941 The paper is being published in the 22 July 2011 issue of Neurology, which is not yet up on that journal's website.