OK, it's good news again that XMRV is being taken seriously. But what exactly is this test designed to do? Will peoples' samples be used in the replication studies of the WPI's research? Or is it simply a private test so people know if they have XMRV? If it's the latter, of what use will the results be at this stage? There's still no confirmation that XMRV actually causes CFS/ME. Of course we're all hoping that the research will come through that proves causation, but right now the science only shows a probable link between the two. If you have the opportunity to take part in a study into XMRV then great, but I can't see the value in taking a XMRV test until (a) the link between CFS/ME and XMRV is clearer and (b) there's treatement available.