Do they presume a blood donor would know about the sexual history of their partners?
They could just test all samples instead of instututing blanket bans like this. When the capital development of a country becomes a by-product of the activities of a casino, the job is likely to be ill-done. — John M. Keynes
It's the same reasons for which light - not skinny - people get drunk much faster. Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant.
As far as I can work out I'm banned in Ireland - I spent more than the limit in total in the UK working summers as a student.
FWIW, I had some sketchy blood work done in Russia, so I think it's best I don't go around donating to the world whatever scariness might be lurking in my red cells. Also, I have a pretty serious phobia about needles and blood, so I'm not inclined to do so to begin with. Come, my friends, 'Tis not too late to seek a newer world.
If there is an epidemic, it seems to have localised itself to Washington and Westminster.