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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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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
![This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande](https://biology-forums.com/gallery/47/medium_376021_22_08_15_1_40_21_223431218.jpeg)
![When Union troops pushed toward Richmond in June of 1862, these slaves crossed the Rappahannock Rive](https://biology-forums.com/gallery/47/medium_376021_22_08_15_1_40_22_22353567.jpeg)