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Vaccines prevent between 2.5 and 4 million deaths every year.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.