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A member asked:
If the cdc states that a 4th generation hiv test excludes hiv in 99% of people at 45 days who is the 1% that it doesnt detect? cant find any info of a 4th generation failing after 3 months?
2 doctors weighed in across 2 answers
I used to work at CDC, before HIV but in the Lab Branch. So any test can have false positives and false negatives. I would write directly to the CDC for the most uptodate answer to this question or to the lab who did your tests. Or go to Pubmed.gov and look at all publications that mention false positive/negative tests for HIV 4th Generation.
Answered 3/14/2022
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If you have continuing concern you may get a test for HIV nucleic acid, though it is not needed to exclude HIV infection given the information you provided.
Answered 4/11/2022
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