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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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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 most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.