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A member asked:
4th gen hiv test after 5 weeks an 4 days negative. is it conclusive?
A doctor has provided 1 answer
Nearly conclusive: The HIV antigen-antibody (AgAb, "combo", "4th generation") blood tests in theory are conclusive by 4 weeks and usually are, but in rare cases (1-2%) it takes up to 6 weeks. 5 1/2 weeks probably is close enough. However, if risk was especially high -- like unprotected vaginal or anal sex with a known HIV infected partner -- it would be best to have one more test 6 weeks or more after exposure.
Answered 2/4/2021
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