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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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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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There are more bacteria in your mouth than there are people in the world.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.