Michel Sidibé, head of the U.N. AIDS agency, speaks during a press conference on the opening day of a conference on HIV pathogenesis, treatment and prevention, at Rome's Auditorium, Sunday, July 17, ... more 
Michel Sidibé, head of the U.N. AIDS agency, speaks during a press conference on the opening day of a conference on HIV pathogenesis, treatment and prevention, at Rome's Auditorium, Sunday, July 17, 2011. Some 5,000 scientists, researchers and health experts are gathering in Rome for a four-day conference on HIV/AIDS, just days after the announcement of a scientific discovery hailed as a breakthrough. Researchers said Wednesday that two studies conducted in Africa showed that an AIDS drug already known to help prevent spread of the virus in gay men also works for heterosexual men and women. The results were to be released at the Rome conference, but after an independent review panel said the benefit was clear-cut, study teams decided to make the announcement ahead of time. (AP Photo/Riccardo De Luca) less 
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Associated Press | Photo By Riccardo De Luca
Sun, Jul 17, 2011 1:32 PM EDT