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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The longest a person has survived after a heart transplant is 24 years.