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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.