I have not been able to donate blood, or sign up for donating bone marrow, because of the MS diagnosis ) :

I had to stop giving blood when I advised them I had been diagnosed with MS. I am on the organ donation list though.

I wad told no

Good to know. Now I don't have to feel so selfish about not donating blood. [My veins are impossible to get at, and blood tests often mean going into my hand.] I'm on the organ donor list. If they don't want them, I guess they'll just reject them.

I was stopped from giving blood in uk...