2 doctors weighed in:

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

2 doctors weighed in
Dr. Gurmukh Singh
Pathology

In brief: 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.

In brief: 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.
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1 comment
Dr. Robert Killian
HIV testing is usually about the antibodies that the body creates after exposure to the virus. Most humans will have this antibody response by 12 weeks. In fact probably 95 % are able to get an accurate positive by this test. But, the other five percent of humans may take up to another twelve weeks for antibody production. There are other tests that are more accurate earlier on.
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