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Undiagnosed or untreated STIs may increase the risk of both acquiring and transmitting HIV. The CDC recommends that all sexually active MSM be tested annually for these STIs 8. For sexually active MSM, the most effective ways to prevent HIV and many other sexually transmitted infections (STIs) such as syphilis, gonorrhea, and chlamydia, are to avoid unprotected anal sex and always use condoms 7. Unprotected receptive anal sex is the sexual behavior that carries the highest risk for HIV acquisition 6.
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Published research does not provide definitive answers about why new HIV infections among young, black/African American gay, bisexual, and other men who have sex with men (MSM) have increased. Factors Contributing to Increase in HIV Infections among Black MSM Guided by the National HIV/AIDS Strategy external icon for the United States, the CDC and its partners are pursuing a high-impact prevention approach to reducing new HIV infections by using combinations of scientifically proven, cost-effective, and scalable interventions directed to the most vulnerable populations in the geographic areas where HIV prevalence is highest.