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by cat199 3361 days ago
Certain categories of people with exposure are to this day disallowed from being blood donors as a result due to the risk and difficulty in testing.

Red Cross rules: " You are not eligible to donate if:

From January 1, 1980, through December 31, 1996, you spent (visited or lived) a cumulative time of 3 months or more, in the United Kingdom (UK), or From January 1, 1980, to present, you had a blood transfusion in any country(ies) in the (UK) or France. The UK includes any of the countries listed below. ... "

http://www.redcrossblood.org/donating-blood/eligibility-requ...