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Blood is approximately twice as thick as water because of the cells and other components found in it.
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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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On average, the stomach produces 2 L of hydrochloric acid per day.
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Medication errors are three times higher among children and infants than with adults.
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There are more sensory neurons in the tongue than in any other part of the body.