If you have recently had a potential exposure to HIV, it is important to seek medical advice immediately. Post-Exposure Prophylaxis (PEP) is a course of antiviral medication that can prevent HIV infection after a possible exposure, but it must be started within 72 hours (the sooner, the better). Understanding HIV Risk in Sexual Roles
Specific Concerns about HIV Transmission
Receptive Role Risk: Being the receptive partner ("bottom") during anal sex is considered the highest-risk sexual behavior for acquiring HIV. The lining of the rectum is thin and delicate, making it easier for the virus to enter the bloodstream through body fluids like semen or pre-seminal fluid.