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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.