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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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Illicit drug use costs the United States approximately $181 billion every year.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.