Now I'm in a less flippant mood I want to comment that I think this blood supply business is the reason we still haven't heard anything from the CDC yet about their replication study of the WPI's findings on XMRV.
Imagine the scenario where they declare to the world that XMRV causes CFS (and maybe cancer) and that 4 percent of the healthy population carries it. Suddenly the nation's ENTIRE blood supply is unusable. The only lab in the world which can check whether any blood is safe is a tiny lab in Nevada which has the capacity to test 30 specimens per week.
We would have a national medical crisis. How many people would die or else have to risk a transfusion of contaminated blood that could make them seriously ill for life, or kill them?
I suspect that the CDC is already trying to lay the groundwork to deal with this before they announce what they have found out about XMRV.
(BTW Ahimsa, I often think that there is simply far too much gravity around me, making it hard to drag my legs up the stairs, an effort to get off the sofa, and just shoving all the blood right down to my feet!)