I'm finding his question of whether or not to mention the vaccines really tough. Until a week or two ago, I don't think I would have believed that the MMR-autism connection was real, and I'm pretty sure that the mere mention of anything to do with this subject will automatically switch off more than half of most audiences. They can be with you all the way on the link with the rise in autism, the similarity and possible link between CFS-autism, the link with XMRV to both...but then you mention the vaccines and they will revise their judgement of everything you have said up to that point, and many will decide you are likely to be wrong. But it's hard, because the understanding of how a retrovirus in the immune system could corrupt our responses to almost anything, combined with a patient's knowledge that some of us are over-sensitive to environmental toxins from mold to toxins, others to virus and infections, others to stress and trauma, some to all of the above...the common thread in all these is an extreme sensitivity to specific triggers causing unusual, even 'medically impossible' phenomena, so I can't just dismiss the idea that a vaccination could be one of a number of types of trigger that could wake up a retrovirus in the immune system. I might wish to describe how well the XAND science fits with my own experience with "Multiple Chemical Sensitivity". But that world also brings its own baggage and perhaps for people who have made up their minds about MCS that would also be a step too far. That would be tough for me, because my experience would have been ruled politically inconvenient. So I find that since I too am 'impossible', I can't just dismiss the vaccine link, especially because the numbers at risk in any study would be very small (a fraction of 1%) and there are other confounding factors that could hide the link (the likelihood that many of the controls will also develop symptoms in the presence of any other trigger), and most powerfully because of the sheer number of people who have said "I have CFS and my children have autism". But we should all be very much aware that questioning vaccines, in many contexts, will tend to undermine the rest of our story.