Blood donation is vital, those who can should, but if there are unknowns donation should be prevented. Still, getting the UK government to ban ME blood, at least until more is known, is, like most things to do with this illness, an uphill struggle. I got 'new' plasma in 1984 (an experimental ME treatment), it niggled me for ages in the 90s - especially when I had a major relapse - that this was pre-HIV screening and I had become infected. I got tested (in USA) and I was fine. I have no idea whether XMRV - also a retrovirus - is responsible for my ME but even before the XMRV debate I would not have considered donating blood - virally-induced neuro-immune illness seems a bit dodgy for my liking to be sharing your platelets. I would certainly not want blood from someone with ME.