Heterosexual Americans are ignoring safe sex practices.
D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission*; D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012309:Risk-Taking; D012725:Sexual Behavior; D012747:Sexual Partners