A controversial pilot project reduced the cost of the most effective malaria drugs by giving manufacturers, such as Guilin Pharmaceutical in China, subsidies. Frederic J. Brown/AFP/Getty Images hide caption

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Health workers take a blood sample from an infant to test for the malaria at a clinic along the border between Thailand and Myanmar. Ben de la Cruz/NPR hide caption

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As white-tailed deer have returned to New England in the past century, they've brought with them tick-borne parasites that cause human diseases. marcinplaza /iStockphoto.com hide caption

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A mother dresses her baby after doctors examined him during the malaria vaccine trial at the Walter Reed Project Research Center in Kombewa in Western Kenya in October 2009. Karel Prinsloo/AP hide caption

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This 5-year-old boy was carried to a Thai malaria clinic by his mother from deep inside Myanmar. If the mother had waited even a day longer, doctors say, the child probably would have died. Ben de la Cruz/NPR hide caption

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Daw Khin Twon, an undocumented immigrant from Burma, rests at home after receiving malaria treatment at the Mae Tao Clinic in Mae Sot, Thailand. Ben de la Cruz/NPR hide caption

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Blood samples dry during malaria screening. Public health workers call for more malaria testing in Africa to stop costly drugs from being handed out to kids with pneumonia. Paula Bronstein/Getty Images hide caption

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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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