I had unprotected sex once—what are my chances of getting HIV?« Back to Previous Page

The risk from a single unprotected encounter is generally low—but not zero. It depends on a few key factors:
Partner’s HIV status (positive, negative, or unknown)
Type of sex (anal sex carries higher risk than vaginal)
Presence of other STDs or cuts/sores
Whether protection (like condoms) was partially used

Estimated Risk (Per Exposure)
Vaginal sex: Low risk
Anal sex: Higher risk
Oral sex: Very low risk

If your partner is HIV-negative, there’s no risk. If their status is unknown, testing is important.
If their status is unknown, Post Exposure Prophylaxis (PEP) should be considered and appropriate tests done at the right time to rule out HIV and other STIs.

What Should You Do Now?
Within 72 hours? → Consider PEP (post-exposure prophylaxis)
After that → Get tested

Most people in this situation do NOT end up with HIV, but testing is the only way to be sure.

Bottom Line:
Risk from one time = low, but possible
Don’t panic. Discuss the PEP option with your doctor if you are within 72 hours of potential exposure.
Get the tests done at the right time.
Take precautions moving forward

Knowing your status gives you peace of mind and control over your health.