In the UK they won't take your blood if you have MS. I'm not sure about other autoimmune conditions though. The reason for not taking it with MS is that they just don't know enough yet about what causes or triggers MS. Guess they are really wary here about anything that affects the brain after all the CKD stuff years ago. In NZ they wouldn't take my blood for years after I had visited a malaria zone, and then the next couple of times they said they would take it but not use it whole - they would have to fractionate it and just use some parts. Haven't tried in the UK, but not sure they would want it with all the drugs floating around in it.