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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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Cyanide works by making the human body unable to use oxygen.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.