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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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Everyone has one nostril that is larger than the other.
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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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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.