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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%