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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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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.