This article is interesting because it established a link between crohn's and a virus and gene mutation. Perhaps what we will see is that many diseases will have this same issue. Virus plus gene mutation equals .... http://www.bionews.org.uk/page_65452.asp also you can find another article at http://www.nlm.nih.gov/medlineplus/news/fullstory_100360.html "It's been suspected that autoimmune and other diseases might be influenced by viral infections, but "this is the first really clear indication of a disease caused by a susceptibility gene and a specific virus," study co-leader Thaddeus Stappenback said in a journal news release." I am wondering if we will find this is the same for XMRV and CFIDS. Perhaps the gene mutates and we get this disease.