Girls as young as 13 were living with full-blown AIDS. Those who resisted were tortured and punished.

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These drug cocktails could keep HIV from ever developing into full-blown AIDS, in which the immune system fails.

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For two decades, scientists have sought a vaccine that would keep HIV from spreading, or at least from turning into full-blown AIDS. Their slow toil has led to a string of failures.

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But this is not necessarily a negative trend, because new treatments - although not providing a cure - are allowing those with the virus to live much longer before contracting full-blown Aids.

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