Defusing a bomb.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000517:prevention & control*; D000293:Adolescent; D002648:Child; D006801:Humans; D007484:Iowa / Q000453:epidemiology; D012572:School Health Services / Q000592:standards*; D012736:Sex Education / Q000592:standards*; D012955:Societies, Medical