Blood and money. The marketplace has helped spread AIDS.
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D000163:Acquired Immunodeficiency Syndrome / Q000097:blood / Q000453:epidemiology / Q000635:transmission*; D001782:Blood Donors; D002681:China / Q000453:epidemiology; D003132:Commerce; D015483:HIV Antibodies / Q000097:blood; D006801:Humans; D015995:Prevalence