HIV epidemic and AIDS: trends in knowledge--United States, 1987 and 1988.
D000163:Acquired Immunodeficiency Syndrome / Q000175:diagnosis / Q000517:prevention & control / Q000635:transmission; D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D002648:Child; D003075:Coitus; D003275:Contraceptive Devices, Male; D004196:Disease Outbreaks / Q000517:prevention & control; D006266:Health Education; D006306:Health Surveys; D006801:Humans; D010174:Pamphlets; D013997:Time Factors; D014481:United States