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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.