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In cities with large populations of men who have sex with men (MSM), the incidence of HIV infection in MSM rose during the late 1990s and early 2000s, despite increased prevention efforts and widespread use of antiretroviral therapy (ART). Now, researchers have investigated the possibility of another phase in the HIV epidemic among MSM.
Using data from the National HIV Behavioral Surveillance system, the investigators compared risk behavior characteristics among MSM in San Francisco in 2004, 2008, and 2011. Men were enrolled from a random sampling of venues and completed an interviewer-administered survey. Of those who were enrolled and interviewed, most underwent serologic testing (386 of 386 [100%] in 2004, 507 of 521 [97.3%] in 2008, and …