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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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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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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.