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A member asked:
How does donated blood that has some kind of infection sometimes pass through all the screening tests?
12 doctors weighed in across 2 answers
Depends on test: Donated blood goes through fairly extensive testing, but is not tested for every possible infection known to man. Tests that are currently done include hiv, hepatitis a, hepatitis b, hepatitis C and liver function. Remember also that no test is ever 100% accurate 100% of the time; false negatives do occur.
Answered 2/19/2015
6.2k views
Timing: If the blood donor was recently infected with HIV or another virus like hepatitis, it may not show up in the blood test. That's why there are so many questions a blood donor must answer before donating, to hopefully rule out any chance for a recent infection.
Answered 6/10/2014
6.1k views
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