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Vaccines prevent between 2.5 and 4 million deaths every year.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.