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I probably lack the medical expertise to comment.... all I know is that I've been donating blood for maybe 20 years (though not as religiously as smurf--I only recently passed the 2 gallon mark). And the list of questions and prohibited factors just keeps getting longer and longer and longer. (Mrs. Dallas is disqualified because of a positive hepatitis test, in conjunction with a case of mono when she was a teenager.) Common sense suggests that each additional prohibition will eliminate some number of donors. How long will it be before the population of available donors is just too small?
It seems to me like it would be more sensible to just take the blood and then make sure it's thoroughly tested--and eliminate specific individuals from the donor pool if there is any reason their blood in unsuitable for donation. I mean, they keep complaining about shortages, while at the same time they're introducing what seem to me--again, as a layman--to be pickier and pickier restrictions.
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