the below quote is from this article http://www.ageofautism.com/2010/09/my-wife-my-daughter-and-xmrv.html At a recent retroviral conference in San Francisco in February of this year there was a good deal of discussion from Emory University researchers about how XMRV is able to infect cells. While it's known that XMRV can infect cells called fibroblasts in the prostate, the epithelial cells also expressed a large number of antigens suggesting they're similarly infected. The epithelial cells are smooth muscle cells which line the interior of blood vessels, telling them to open up or constrict. The researchers at the conference theorized these blood vessel infections might cause many of the brain and other abnormalities observed in chronic fatigue syndrome. Abnormalities in blood flow in the brains of children with autism have also been observed and discussed for many years.