Dr. Esther Dalizu holds a pack of Coartem Malaria drugs in a pharmacy in Nairobi, Kenya, last year. Sayyid Azim/AP hide caption

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Health employees protest outside the Health Ministry in Athens against pay and budget cuts. Fewer resources for malaria treatment and mosquito control may be contributing to malaria's comeback in Greece. Aris Messinis/AFP/Getty Images hide caption

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More than 90 percent of Kenyans use mobile phones, giving scientists a powerful tool to track how diseases spread. Simon Maina/AFP/Getty Images hide caption

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Ayo Bello grabs a box of malaria medication at a pharmacy in Lagos, Nigeria. A pilot project by the Global Fund has helped private pharmacies and clinics sell top quality malaria drugs at wholesale prices in Nigeria and seven other African countries. Sunday Alamba/Associated Press hide caption

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The Anopheles stephensi mosquito transmits the malarial parasite while dining on human blood. You can find this type of mosquito in Afghanistan, China, India, Thailand and the Middle East. CDC hide caption

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A micrograph shows red blood cells infected by the malaria parasite Plasmodium falciparum. John C. Tan/AP hide caption

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Chhay Meth, 9, suffering through an attack of malaria at the family's home in O'treng village on the outskirts of Pailin, Cambodia, in 2009. A drug-resistant form of malaria in the region medical led officials to declare a health emergency. David Longstreath/AP hide caption

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A mother held her baby as she received an experimental malaria vaccine at the Walter Reed Project Research Center in Kombewa in Western Kenya in Oct. 2009.

Karel Prinsloo/AP hide caption

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Women hold mosquito nets after receiving them at a distribution point in Sesheke, Zambia. Researchers say malaria may have rebounded in some parts of Zambia and Senegal because of resistance to the insecticide-treated nets. ASSOCIATED PRESS hide caption

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