MMWR: HIV Testing Among Men Who Have Sex with Men --- 21 Cities, United States, 2008

Although men who have sex with men (MSM) comprise an estimated 2% of the overall U.S. population aged ≥13 years, 59% of persons with diagnoses of human immunodeficiency virus (HIV) infection in the United States in 2009 were MSM, including MSM who inject drugs.

Source: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6021a3.htm

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