title: Changing patterns of disease.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome; D003141:Communicable Diseases / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D004194:Disease; D004196:Disease Outbreaks / Q000453:epidemiology*; D006801:Humans; D008019:Life Style; D014481:United States