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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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People about to have surgery must tell their health care providers about all supplements they take.
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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.