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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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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Vaccines prevent between 2.5 and 4 million deaths every year.