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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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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.