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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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On average, the stomach produces 2 L of hydrochloric acid per day.