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Diagnosis of HIV Infection among Adults and Adolescents, by Transmission Category (2010)*

See text description below*These transmission categories do not distinguish infections resulting from non-injection drug use (e.g., sexual behavior resulting from drug or alcohol intoxication).
Source: Centers for Disease Control and Prevention

Male-to-male sexual contact: 61%
Injection drug use: 8%
Male-to-male sexual contact and injection drug use: 3%
Heterosexual contact: 28%
Other: <1%

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