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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Everyone has one nostril that is larger than the other.
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Your heart beats over 36 million times a year.
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Medication errors are more common among seriously ill patients than with those with minor conditions.