US boosts disease surveillance effort.
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D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D002487:Centers for Disease Control and Prevention, U.S.; D003140:Communicable Disease Control / Q000191:economics / Q000458:organization & administration*; D006077:Government Agencies; D015658:HIV Infections / Q000517:prevention & control; D006801:Humans; D007391:International Cooperation; D014481:United States; D014944:World Health Organization