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Associated Press
This photo provided by Gilead Sciences shows Truvada.  Federal drug regulators on Tuesday affirmed landmark study results showing that a popular HIV-fighting pill can also help healthy people avoid contracting the virus that causes AIDS in the first place. While the pill appears safe and effective for prevention, scientists stressed that it only works when taken on a daily basis. The Food and Drug Administration will hold a meeting Thursday to discuss whether Truvada should be approved for people who are at risks of contracting HIV through sexual intercourse. The agency's positive review posted Tuesday suggests the daily pill will become the first drug approved to prevent HIV infection in high-risk patients.  (AP Photo/Gilead Sciences)

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