Eliminating everyone in that class because transmission of a disease that has never happened via that route cannot be ruled out conclusively is not, imo, sound risk management.
But after the way the Red Cross handled the 911 donations, I no longer have confidence in their practices and consider E. Dole's role there a liability for her instead of an asset.
I refuse to give money to any charity associated with United Way, but I will give the Red Cross my blood.