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A member asked:
If the cdc states that an hiv 4th gen test window period is 18 -45 days and an rna pcr test is 14 - 33. why are doctors on healthtap saying to re-test at 90 days? if you used those tests at six weeks for the 4th gen test at the rna at five weeks?
A doctor has provided 1 answer
Most HIV and infectious diseases experts agree with the CDC guidance and that is my advice on HealthTap. Some doctors (whether on HealthTap or elsewhere) have more conservative perspectives; and in some cases they may still rely on performance of older antibody-only HIV tests that required 3 months for conclusive results. Negative RNA and 4th get results at the times you state are conclusive.
Answered 10/5/2021
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