Peter Piot was one of the co-discoverers of the Ebola virus in 1976. "I never thought we would see such a devastating and vast epidemic," he says. Leon Neal/AFP/Getty Images hide caption

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Over a decade ago, rumors spread in South Africa that sex with a virgin could cure HIV/AIDS. In 2001, 150 people gathered in Cape Town to protest the rape of children and even babies, allegedly as a result of belief in this canard. Anna Zieminski/AFP/Getty Images hide caption

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Truvada has been around for a decade as a treatment for people who are already HIV-positive. In the last few years, it has also been shown to prevent new infections, and New York officials are embracing the pill as a way to prevent the spread of AIDS. Justin Sullivan/Getty Images hide caption

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Joep Lange led many early drug trials of HIV therapies and studied how to prevent HIV-positive pregnant women from transmitting the virus to their babies. Jean Ayissi/AFP/Getty Images hide caption

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At a July 18 press conference at Amsterdam's Schiphol Airport, Vice President of Malaysia Airlines Europe Huib Gorter talk about the crash of flight MH17. Christopher Furlong/Getty Images hide caption

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AIDS drugs line a pharmacy's shelves. A new recommendation from the World Health Organization suggests a daily anti-HIV pill for men who have sex with men. Astrid Riecken/MCT/Landov hide caption

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United Nations Aids Executive Director Michel Sibide hugs Secretary of State Hillary Clinton after they they presented the a road map for stopping HIV around the world. Jim Watson/AFP/Getty Images hide caption

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Young activists distribute condoms at an AIDS awareness event in Ashbury Park, N.J. Charles Sykes/AP hide caption

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HIV treatment regimens, like the pills in this patient's hand, keep AIDS at bay, but can take a harsh physical toll over the course of many years. Amy Sancetta/AP hide caption

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