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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.