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Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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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 horizontal fraction bar was introduced by the Arabs.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.