Number of new AIDS cases in U.S. declines for first time since AIDS/HIV epidemic began.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D014481:United States / Q000453:epidemiology