In 2011, 1,925 cases of malaria were reported in the U.S., the most since 1971, Centers for Disease Control and Prevention officials wrote in the Morbidity and Mortality Weekly Report. Five of the patients with reported cases died that year from the disease or from related complications. Almost 70% of the reports were related to travel to and from Africa, where the disease is common. The surge "reminds us that Americans remain vulnerable and must be vigilant against diseases like malaria because our world is so interconnected by travel," CDC Director Dr. Thomas Frieden said.

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