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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.