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The human body produces and destroys 15 million blood cells every second.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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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.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.