title: Safe sex vs. abstinence: which is most effective?
mesh_terms: D000293:Adolescent; D001741:Black or African American; D002648:Child; D017280:Condoms / Q000706:statistics & numerical data; D005260:Female; D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans; D008297:Male; D012736:Sex Education; D012746:Sexual Abstinence; D012725:Sexual Behavior / Q000706:statistics & numerical data; D014481:United States