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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."