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Vaccines prevent between 2.5 and 4 million deaths every year.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.