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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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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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There are more sensory neurons in the tongue than in any other part of the body.
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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.