title: AIDS prevention trial seeks answers.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D000998:Antiviral Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D006801:Humans; D007391:International Cooperation; D013997:Time Factors
chemical_list: D000998:Antiviral Agents