HIV testing is the answer--what's the question?
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D000163:Acquired Immunodeficiency Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D004992:Ethics, Medical; D005189:False Positive Reactions; D006679:HIV Seropositivity / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008403:Mass Screening / Q000592:standards*