Is a negative test after three months accurate?
Hi, I had sex with a girl. Five weeks (37 days) after the exposure, I got HIV test and the result was negative. 91 days after exposure I got HIV test again for confirmation, the result is negative.
My questions are:
1. Does it mean that I am really HIV negative?
2. Should I get HIV test again next December 2007 (6 months after exposure)?
Yes, after this time the results are very accurate.
To question #1: Unless you had another exposure risk during the 91 days period, then yes, the test shows that you are HIV negative.
To question #2: In very rare cases it takes more than 40 days for the body to develop antibodies to HIV that can be picked up by the test. That is why it is a good idea to test again three months after the possible risk, even though the chances of a positive result then are very small.
This question was updated in January 2018 from an original answer posted in October 2007. i-Base no longer answers individual questions about testing and transmission – please see: Question 1 at this link for more information).