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Did you know?
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The horizontal fraction bar was introduced by the Arabs.
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.