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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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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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Cyanide works by making the human body unable to use oxygen.