Acquired immunodeficiency syndrome. Epidemiologic update.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology*; D006205:Haiti / Q000208:ethnology; D006467:Hemophilia A / Q000150:complications; D006716:Homosexuality; D006801:Humans; D012306:Risk; D019966:Substance-Related Disorders; D014481:United States