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Did you know?

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.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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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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Medication errors are three times higher among children and infants than with adults.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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