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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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There are more bacteria in your mouth than there are people in the world.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.