Canadian Prime Minister Stephen Harper (left) and French President Nicolas Sarkozy meet at the G8 summit in Huntsville, Ontario. Eric Feferberg/AFP/Getty Images hide caption
Global Health
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Melinda Gates discusses maternal and child health at a womens' health conference in Washington on Monday. Haraz N. Ghanbari/AP hide caption
Gates Foundation Pledges $1.5 Billion To Child And Maternal Health
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Aminat Makebo (left) grieves the death of her granddaughter at a medical center run by Medecins Sans Frontieres in Kuyera, Ethiopia, Sept. 2008. Roberto Schmidt/AFP/Getty Images hide caption
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Mosquitoes like this one, called Aedes aegypti, transmit the virus that causes dengue fever. James Gathany/CDC hide caption
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An HIV-positive orphan lies in a cot at a hospice in Nairobi, Kenya, in 2005. Tony Karumba/AFP/Getty Images hide caption
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An outbreak of polio in Tajikistan has public health workers scrambling. irene2005/Flickr hide caption
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Smoke and steam rises from the volcano under the Eyjafjallajokull glacier in Iceland. Iceland Coastguard/AP hide caption