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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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Cyanide works by making the human body unable to use oxygen.
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Illicit drug use costs the United States approximately $181 billion 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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.