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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Medication errors are more common among seriously ill patients than with those with minor conditions.
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Asthma cases in Americans are about 75% higher today than they were in 1980.