Is a HIV test accurate at 18 days?
I had an exposure nearly 3 weeks ago, I wanted to get tested next Thursday at the 28 day mark. However stupidly I did something else 1 week ago. If I took my HIV test 15 days after an exposure that would not show anything would it? If I took it 18 days then confirmed it with another one after 2 weeks would that give me a good indication for my latest exposure?
Thank you for your question.
A test earlier that 28 days will no do you any harm, but it is not sensitive to tell you very much.
The fourth generation HIV tests will detect 95% of infections 4 weeks after an exposure. A fourth generation test 12 weeks after the exposure is needed to rule out the small chance that you take longer than 4 weeks to develop HIV antibodies.
For more information on HIV tests please follow this link