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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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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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The horizontal fraction bar was introduced by the Arabs.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.