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The Medical Monitoring Project (MMP) collects behavioral and clinical data on a representative sample of adults in HIV care.

Learn more about the MMP.

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  • Men who have sex with men (MSM) account for 64% of all new HIV diagnoses in King County.
  • Since 2007, the rate of new diagnoses among MSM has declined 47%.
  • Hispanic MSM account for 9% of the estimated King County MSM population but account for 24% of all new diagnoses among MSM.
  • 83% of HIV-infected MSM are virally suppressed.
  • Approximately 1 in 5 HIV-uninfected MSM in King County is currently using PrEP.

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  • Local surveys of women who exchange sex have found an HIV prevalence that is the same or lower than among women who did not report exchange sex.
  • In most local data, HIV prevalence is higher among MSM who exchange sex than MSM overall.

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  • New HIV diagnoses among people who inject drugs (PWID) and do not report other risk factors are relatively rare, with only 11 new diagnoses in 2016 among PWID who are not men who have sex with men (MSM).
  • HIV prevalence is high (40-45%) among PWID who are MSM and inject methamphetamine.
  • The majority (>70%) of HIV-infected PWID are virally suppressed.
  • In 2016, the PHSKC Needle Exchange exchanged nearly 7 million syringes and launched an on-site buprenorphine treatment program.
  • A survey of Needle Exchange clients found increasing rates of homelessness and methamphetamine use among PWID.

Download the PITCH infographic (PDF)

The PITCH (Preventing Infection Through Community Health) Study is part of a national health survey funded by the CDC Each year we survey one of three different populations to learn about HIV prevalence, sex and drug use, HIV testing, and use of local HIV prevention programs. The survey provides up-to-date information to help improve HIV prevention in King County.

Learn more about the PITCH Study.

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  • Data on transgender and gender non- conforming individuals in King County are scarce.
  • About 5-6% of transgender women and other gender-non-conforming individuals assigned male at birth in local surveys report HIV infection, relative to none of the transgender men and non-conforming individuals assigned female at birth.

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  • HIV is diagnosed at high rates among Blacks relative to overall King County rates.
  • HIV diagnosis rates in 2016 for Blacks, both U.S.-born and foreign-born, were about half of the diagnosis rates 10 years earlier.
  • In 2016, 85% of foreign-born Blacks and 74% of U.S.-born Blacks living with HIV.

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  • HIV is diagnosed at high rates among Latinos relative to overall King County rates.
  • HIV diagnosis rates declined in 2007-2016 among both U.S. born and foreign-born Latinos, by about half and a third respectively.
  • In 2016, about 80% of Latinos living with HIV—both U.S.-born and foreign-born—were virally suppressed.

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  • HIV is diagnosed at low rates among women relative to King County residents overall.
  • Foreign-born women account for roughly half of HIV cases among women in King County, but only about 21% of women living in King County are foreign-born.
  • Black women are also disproportionately impacted by HIV. About two-thirds of Black women living with HIV in King
    County are foreign-born.