How common is HTLV-III infection in the United States?
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology*; D004812:Epidemiologic Methods; D006467:Hemophilia A / Q000453:epidemiology; D006716:Homosexuality; D006801:Humans; D019966:Substance-Related Disorders / Q000453:epidemiology; D014481:United States