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Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.