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- 问题详情：SouthAfricanresearchersattheinternationalAIDSconferenceinVienna,Austriahaveannouncedmajorprogressinthefightagainsttheresearcherssaytheirstudyshowsagel（胶体）substancereducedtheriskofHIVinfectionamongwomenwhousedit.Thegelcontainstenofovir,whichis...
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