[Question #13775] HIV Risk New Encounter

 
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20 days ago
Hi, I had unprotected sex with a girl that I didn’t know just met on a dating app (she said she’s bisexual and has had threesome before and into guys who r gay) and she was on like the last day of her period. She said she is clean for all STDs but I only asked after the fact. What are chances of getting HIV from this encounter with unprotected sex on her last day of period so there was a little blood? Should I get tested and if so when? Anything I can do now after the fact to reduce odds of getting hiv or any std from this encounter ?
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Edward W. Hook M.D.
20 days ago
Welcome back to the Forum.  In preparing to respond there are several themes which in large part repeat themselves.  These include that you recruit partners who you find through dating apps and who, not suprisingly have had other partners.  You then start to worry.  Just as there are several themes to your questions, the substance of my responses will be similar to facts that Dr. Handsfield have provided you in the past.  Those facts include:

1. Most persons, even those with multiple partners or who may have had partners that are bisexual, do not have STIs, including HIV.
2.  Most single exposures with infected partners, if they happen to have an STI, do not lead to infection.  The likelihood varies from STI to STI but in all cases, even if your partners have STIs you are unlikely to become infected.  For HIV, if your partner had untreated HIV (less than 1% chance that that was the case), your risk of infection is less than one in 2000,  i.e. there is a 99.95% chance you would NOT become infected
3.  Despite the somewhat slightly higher risk that your casual partners may represent, you choose not to use condoms.

The past that your partner was on the last day of her period makes no different.  In persons with HIV the amount of HIV present in menstrual blood is about the same as the amount which is present in genital secretions.

Bottom line, your risk of STIs, including HIV is low, very low.  While testing is always a personal choice, I anticipate that you may choose to test.  Testing for the most common STIs, such as gonorrhea and chlamydia will provide conclusive results any time more than 3-5 days after your encounter and testing for STIs such as syphilis or HIV will be conclusive at 6 weeks.  

I hope this information is helpful.  EWH
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