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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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The average office desk has 400 times more bacteria on it than a toilet.