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HIV through receiving blowjob

Question: 

I received a blowjob from a girl at massage parlor on March 23, 2019. It was unprotected. I did not give her oral sex and neither was any penetrative sex involved (no vaginal or anal sex). On April 29th, 2019 (more than 5 weeks after the exposure), I went for the HIV Ab test, which came back negative. I know that most of the people develop detectable antibodies by 4-6 weeks. Considering the risk of my exposure, is any further testing warranted in my case? I will go for another test at 12 weeks, anyways. But how would you guys rate my current result? How much would you guys "consider" it conclusive?

Answer: 

Hi there,

Thank you for your inquiry. From what we gather from the question, you were asking about the risk of HIV acquisition given a receptive oral sex encounter, and the conclusiveness of the negative HIV ab test you received more than 5 weeks following the exposure.

From the information given, this scenario is determined to be of No Risk: (transmission of HIV is not possible in the given scenario).

Considering your risk, and the negative results from the HIV testing you received approximately 5 weeks after the exposure; you may consider your results reliable, yet, not ultimately conclusive.

Official HIV testing guidelines do recommend re-testing at 12 weeks post exposure. Although this is a recommendation, we advise you to re-test at this time for completely conclusive results.

Until then, it appears as though the chances of HIV acquisition for this scenario are extremely low.

In this case, we recommend you seek additional HIV testing at approximately 12 weeks post exposure to ensure that your initial results are absolutely conclusive.

All the best,

AIDS Vancouver Online/Helpline, Cody