Strictly speaking, this topic is not about XMRV or CFS -- yet. I'm posting this anyway for reasons most people reading this section will immediately grasp. The BBC is reporting on a link between autism and immigration. They don't mention infection by anything as a possible cause. They do mention stress and social isolation. Infection might explain why results on autism and genetics have been so thoroughly mixed. I don't know about social isolation, but I'm well aware that stress, or exposure to new viral infections, can trigger latent viral infections which have been held in check by a reasonably healthy immune response. Considering Dr. Mikovits comments on XMRV in autism, this sounds like an obvious line of research. Does anyone have a link to actual research? I didn't find one in a cursory search.