PC insanity.
My husband's brother contracted one of them, no one knows where it is like a rabid form of mad cow disease. In 8 months he was a veggie and died soon after with huge holes in his brain. All his relatives and their families are forbidden to donate blood.
In fact they no longer will do family member to family member, DIL is semi rare A- needed a transfusion, her bro offered to donate his blood, was told that it had to go through a month long RC processing procedure. Doc nick a vein when he did her Mascetomy, and had to go back in and repair it. Only thing she ended up with was some dumb iron pills instead of the transfusion she needed.