Hi doctors, thanks for your help! For my situation, I have figured out that oral sex has no hiv risk. What I want to consult now is about my friend who had unprotected vaginal sex. So she took pep and tested 6 weeks after completion of pep. Negative. But unfortunately she tested positive for syphilis in the first few weeks. So some doctors advised her to retest hiv in 6 months. Such a long time makes her very anxious. On her behalf, I wondered if syphilis would affect HIV testing. Can hiv be ruled out for a total of 10 weeks?