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Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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People about to have surgery must tell their health care providers about all supplements they take.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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.
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On average, the stomach produces 2 L of hydrochloric acid per day.