Sexually transmitted diseases and HIV infection.
D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000453:epidemiology; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012749:Sexually Transmitted Diseases / Q000453:epidemiology*