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A member asked:

How reliable is a negative hiv test 23 weeks after possible exposure?

A doctor has provided 1 answer

Depends on the test: A negative test for HIV nucleic acid will rule out HIV at 23 weeks after exposure. Absence of HIV antigen will essentially rule out hiv. Absence of antibody will more or less rule out HIV but should be confirmed with HIV nucleic acid test.

Answered 9/10/2017

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Hiv RNA PCR test taken at 13 days post exposure result was negative. I am taking 4th gen ab/ag test at 28 days is the result likely to change or is the hiv rna PcR pretty reliable at 13 days?

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My Hiv RNA PCR test taken at 13 days post exposure result was negative. I am taking 4th gen ab/ag test at 28 days is the result likely to change or is the hiv rna PcR pretty reliable at 13 days?

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How accurate is a HIV RNA test at 13 days post exposure? If I am negative can I reliably trust this result, also this exposure I used a condom but it slipped. But as I said I am negative at 13 days after exposure using the HIV RNA, how reliable?

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