[Question #3167] Doubt about time hiv test

40 months ago
 I have a question a about the time for test 4 gen. I took it at 28th in the morning(it means during 28th day) this was 6 hours after ends of 27th day, is it conclusive.. sorry for make this kind of questions is just for my personal peace of mind and try to continue with my life of married.

Thanks

Charlesobss
H. Hunter Handsfield, MD
H. Hunter Handsfield, MD
40 months ago
Welcome back to the forum, although I'm sorry to see you found it necessary. As Dr. Hook informed you a few days ago, the exposure you described did not put you at risk for HIV and you really didn't need testing at all.

The data on time to reliable results with the HIV blood tests are not all that precise. There is no measurable difference between a full 28 days and 27 days (or even 25-26 days). However, even 28 days is a bit too soon; your test result is 98-99% conclusive. The antigen-antibody ("combo", "4th generation") HIV blood tests require 6 weeks for 100% conclusive results.

However, I suggest you continue unprotected sex with your wife (or resume it, if you have not done so by now). There is no chance you have HIV.

Best wishes. Let me know if anything isn't clear.

HHH, MD
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40 months ago
Dr. Thanks for your answer. It is no easy for me try to finish this situation. In some sites i read thay you say the 4gen was conclusive at 28 days.. and i like to be sure to get out of my mind this unsecure feelings about the sicks.. thanks for understand me.. best
H. Hunter Handsfield, MD
H. Hunter Handsfield, MD
40 months ago
For several years, we indeed said 4 weeks was sufficient for conclusive for the HIV Ag-Ab tests, but a few months ago we became aware of new data and recommendations (from CDC) indicating that 6 weeks is needed. That is our current advice. However, 28 days is nearly conclusive and you can consider your results definite. (Let's say there was 1 chance in a million you could have caught HIV from the oral sex event. If your test at 27+ days is 99% reliable, it reduces the chance you have HIV from 1 in a million to 1 in a hundred million. That's zero for practical purposes.)

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40 months ago
Dr thanks for your answer and understanding about it.