Blood sucking:

I've been trying to figure out whether anyone will take my blood, tainted by my three plus months in the UK despite my almost nil beef consumption during this time. I had read that the guidelines had changed.

It appears that the FDA does not (less than 3 months from 1980-1996 and less than 5 years since 1996). However, Red Cross and DoD donor deferral rules still defer me indefinitely (more than 6 months cumulative in Europe since 1980). Since everywhere I know uses Red Cross or DoD rules, I guess that no one will get the benefit of my O-negative blood.