Hi there, and thanks a lot for contacting the AIDS Vancouver Helpline for your HIV/AIDS related health information. It seems you're concerned about the possibility of HIV transmitting during an encounter, and about the accuracy of some tests you've had done since then. We're happy to answer your question for you.
First off, protected sex is considered a low risk activity. Low risk means that while transmissions are possible, they require specific circumstances to occur (like the condom breaking, for example). To see the risk level of this activity and many others, we encourage you to check out our [risk assessment page](http://helpline.aidsvancouver.org/question/risk-assessment-chart).
You've had the 3rd generation ELISA test, the NAAT test, and the DUO test. Here is a bit more information on these tests:
|Test Name ||Method ||Window Period ||Conditions |
| Enzyme Immunoassay Antibody (EIA) 3rd Generation (ELISA) ||Blood test that looks for antibodies. || Up to 95% of infections are detectable within 4-6 weeks post exposure. Most people develop detectable antibodies in 21-25 days. ||Most commonly available testing method. Conclusive at 3 months post exposure. ||
|NAAT (PCR RNA & DNA) || Nucleic-Acid Amplification Testing (NAAT) looks for the genetic material of HIV and tests for it with a Polymerase Chain Reaction (PCR) test. ||2-3 weeks post exposure || NAAT tests generally take two forms: DNA PCR and RNA PCR tests. DNA PCR NAAT tests are usually used for screening babies of HIV+ mothers. RNA PCR NAAT tests are often used to screen blood or organ donations. Both measure the viral load of a positive person’s blood. Conclusive at 3 months post exposure|
|4th Generation EIA || Blood test that looks for antibodies AND p24 protein antigens. Commonly referred to as the "combination," "combo" or "DUO" test. ||P24 protein is detectable immediately after infection but only for the first few weeks. The antibody (ab) test has a window period of 4-12 weeks post exposure. || This test is widely available in North America. Most HIV specialists consider this test to be conclusive at 6 weeks but official HIV testing guidelines still recommend re-testing at 12 weeks for conclusive results. Conclusive at 3 months post exposure. ||
You'll notice that common to all of these tests is that they are considered conclusive, meaning their results are taken as accurate, 3 months post exposure. Your last test was done approximately 1 month post exposure. 1 month is too soon for the test to demonstrate your status conclusively. You'll need to wait at least 3 months to go for a test that will demonstrate your status conclusively (meaning the results would then be taken as accurate).
Thanks a lot for contacting the AIDS Vancouver Helpline with your question, we hope it has been answered fully.
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