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HIV Epidemiology


HIV Epidemiology

Contact Information
Los Angeles County
Department of Public Health
HIV Epidemiology, DHSP                       600 S. Commonwealth Ave. Suite 1920
Los Angeles, CA 90005
Phone: (213) 351-8196
Fax: (213) 487-9386


        LAC's ZIP code level data/maps on HIV

HIV Epidemiology - Fact Sheet on HIV Prevalence and Risk Behaviors in Los Angeles Countyís Young Menís Survey (YMS)
  • Of 727 men interviewed for the Young Menís Survey (YMS), 33% reported exclusive homosexual activity, 51% reported bisexual activity, 11% reported exclusive heterosexual activity, and 4% reported never having experienced sexual intercourse.
  • Overall prevalence of HIV infection among sexually active young gay/bisexual men 15-22 years of age was 8.7% (60/689).
  • HIV prevalence varied widely by the race/ethnic group of YMS participants. HIV prevalence among Caucasian males was 4% (8/198), African Americans 16% (22/135), Latinos 8% (19/245), Asian/Pacific Islanders 10% (4/40), Native Americans 0% (0/14), and multiracial 12.5% (7/56).
  • Young men who have sex with men (MSM) are at high risk for HIV infection.
  • Young MSM of color are at greater risk of HIV infection than young Caucasian men.
  • HIV prevalence varies according to the gender of sexual partner(s) in the past 6 months. Men who had sex with men exclusively in the previous 6 months have an HIV prevalence of 11% (49/464); men who had sex with both men and women have a prevalence of 9% (8/90); men who had sex with women exclusively have a prevalence of 0% (0/88) and men who didnít have sex in the past 6 months have a prevalence of 6% (3/47).
  • Of the 548 young men who have had sex with men, 51% reported at least one episode of unprotected insertive or receptive anal sex with another male in the six month period prior to interview.
  • Twenty-five percent of men reporting unprotected anal sex in the past 6 months believed that it was likely that they were HIV-infected. Fourteen (20%) of these 69 men actually tested positive for HIV antibodies at the time of the interview.
  • Two-thirds of all sexually active young men (470/697) report a previous HIV test. Seventy-three percent (402/548) of men who have had sex with men in the past 6 months report a previous HIV test.
  • Only 6 of the 60 males testing positive for HIV antibodies knew their HIV-positive status.

Source: HIV Epidemiology Program, LACDHS, 11/98

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