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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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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.