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In 2016, two thirds of diagnosed human immunodeficiency virus (HIV) infections in the United States were attributed to male-to-male sexual contact (1). The risk for sexual acquisition and transmission of HIV changes through the lifespan (2); to better guide prevention efforts for gay, bisexual, and other men who have sex with men (MSM*), CDC analyzed National HIV Surveillance System † (NHSS) data for MSM aged ≥13 years by age group (13-29, 30-49, and ≥50 years) in 50 states and the District of Columbia (DC). During 2008-2016, the annual number of diagnoses of HIV infection increased 3% per year among MSM aged 13-29 years, decreased 4% per year among those aged 30-49 years and was stable for MSM aged ≥50 years. The number of HIV diagnoses among MSM aged 13-29 years was four times that of MSM aged ≥50 years. During 2008-2015, the number of MSM aged ≥50 years living with diagnosed HIV infection (prevalence of HIV infection) increased an average of 11% per year and at year-end 2015 was three times that of MSM aged 13-29 years. Racial/ethnic disparities in HIV infection persisted, particularly among younger black/African American MSM who accounted for 49% of all diagnoses among MSM aged 13-29 years during 2008-2016. To avert the most infections and improve health outcomes (3), sexually active MSM at risk for HIV infection should be tested at least once a year, and, if positive, linked to and retained in HIV medical care to achieve viral suppression (4). Those testing negative should be provided HIV prevention services, including preexposure prophylaxis (PrEP) (5).

Age-Associated Trends in Diagnosis and Prevalence of Infection with HIV Among Men Who Have Sex with Men — United States, 2008–2016