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If you could remove all of your skin, it would weigh up to 5 pounds.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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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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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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