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A member asked:
I had hiv 4th gen combo test negative at 19, 26, 31, 33 days after potential exposure, how likely it is to change to positive at later dates?
A doctor has provided 1 answer
In newly infected people, 98-99% of HIV AgAb ("4th generation", "combo") HIV blood tests are positive by 28 days, but it can take up to 45 days. Almost certainly you do not have HIV and it is extremely unlikely later testing will be positive. Have just one more test 45 days or later; then no further testing.
Answered 6/20/2023
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Potential exposure, I had receptive anal sex with no condom, unknown on status. Had a negative 4th gen HIV test at 38 days. Do I truly need to test 7 days later at 45 days? What are the chances Ill turn positive after 45 days? Thought 4 weeks was it?
3 doctors weighed in across 2 answers
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