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Everyone has one nostril that is larger than the other.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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.