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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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Vaccines prevent between 2.5 and 4 million deaths every year.