title: HIV prevalence declined among high-risk group. Serosurveillance at STD clinics has value.
abstract: Investigators analyzing data obtained from at-risk populations in the West found a decline in HIV infection between 1989 and 1999.
mesh_terms: D000328:Adult; D000554:Ambulatory Care Facilities; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D015528:HIV Seroprevalence; D006801:Humans; D008297:Male; D011159:Population Surveillance; D012307:Risk Factors; D012749:Sexually Transmitted Diseases / Q000453:epidemiology; D014481:United States / Q000453:epidemiology