Hi. 24 days ago I received oral and anilingus. I know the risk is negligible for these, but the thing is I had a cut around my anus where he was giving. I don't know why I'm stressing this so much. Is 24 days too soon to get accurate results from a 4th generation test? Also, are you guys related to CDC in terms of information about everything with risks and such?
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. We're happy to answer your question for you.

As you've already mentioned, receiving oral sex is considered a negligible risk activity, meaning that while transmissions are theoretically possible, none have been shown to occur as a result of activities such as these. To see the risks associated with this and various other activities, we encourage you to check out our [risk assessment page](

You seem a bit more concerned because you say you had a cut around your anus. Know that saliva is not actually a fluid known to be involved in transfer, and "cuts" are not known to increase the risk of transfer to any significant extent. Much larger, gaping, wounds are what would need to be present to increase the risk of transfer to any significant extent.

We've gone over the risks associated with this encounter, but yes, 24 days is too soon for the results of a 4th generation test to be accurate. Here is a bit more information on the 4th generation test:

You'll see that the results are conclusive, meaning taken as accurate, 3 months post exposure. But please consider the risks involved here in deciding to go for testing. Of course, if you've never been for a test, we at AIDS Vancouver recommend routine testing for all sexually active individuals, so if you've never been for a test, we'd encourage you to go.

We at AIDS Vancouver are not affiliated with the CDC, but we do routinely use the information the CDC provides in answering questions. A lot of our information is based on the CDC's research.

Thanks a lot for contacting the AIDS Vancouver Helpline with your question, we hope it has been answered fully.


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Test Name Method Window Period Conditions
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. |