An artist on Rio de Janeiro's Copacabana beach puts the final touches on a sand sculpture of the assassin bug, which spreads Chagas disease. The sculpture was part of an event in 2009 commemorating the 100th anniversary of the discovery of the disease. Vanderlei Almeida/AFP/Getty Images hide caption

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Vanderlei Almeida/AFP/Getty Images

Biggest Bucks In Health Care Are Spent On A Very Few

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Experiences in youth shape our health in old age. That's the key lesson from the world's longest-running medical study. iStockphoto.com hide caption

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Poked And Prodded For 65 Years, In The Name Of Science

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Public health innovation gets its closeup. Laila Abdul-Hadi Jadallah/FastForward Health hide caption

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Laila Abdul-Hadi Jadallah/FastForward Health