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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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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.