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4th generation at 30 days? (U.S)

Hi i called the lab about a 4th generation test and after being given the price i asked them what the window period is and they said 6 weeks... But i keep seeing 4 weeks? It will be 30 days on thursday which is when i plan to take it...

If i take it at 30 days and its negative can i accept that as conclusive and move on and jist put this all behond me? Tired of stressing over this since the encounter .

2 Responses
188761 tn?1584567620
What was your risk, please?
Unprotected sex. Vaginal recieving
188761 tn?1584567620
Yes, a 4th generation HIV test can be considered conclusive at 4 weeks in your case, at that time this test is said to be about 95% accurate. For a low risk exposure, the above number is sufficient to rule out HIV infection.

This test is best at 28 days, since the average time to sero-conversion is about 21 days, a week post that (28 days) most infected individuals would start to produce detectable amount of antibodies. However- although very unlikely, if the antibodies are not produced at that time, P24 antigen would be detected since the body would be in process of sero-conversion.

If you wish to be conservative and want an absolute confirmation, a test at 6 weeks will rule out HIV infection with an accuracy of 99.9% since any possibility of slight delay in sero-conversion will also be ruled out with this one. This is mostly to cover for the theoretical risk.
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