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Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Everyone has one nostril that is larger than the other.
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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.