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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.
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There are more sensory neurons in the tongue than in any other part of the body.
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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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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.