Here's a link to a great blog post that neatly summarizes the recent discovery of a retrovirus that seems a highly likely cause of ME.
I devoutly hope that this advance eliminates all the lingering and destructive prejudice that attaches to ME - yes, unbelievers, it is a real illness! I also hope it leads to a cure, and that sooner rather than later.
Here is a link to the website of the The Whittemore Peterson Institute for Neuro Immune Disease
It seems I'm probably affected by Xenotropic murine leukemia virus-related virus, otherwise called XAND.
Here's the website of XAND and XMRV.com, which looks like it will be a useful source of information.