It's the same reasons for which light - not skinny - people get drunk much faster. Un roi sans divertissement est un homme plein de misères
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. "Pretending that you already know the answer when you don't is not actually very helpful." ~Migeru.
If there is an epidemic, it seems to have localised itself to Washington and Westminster.