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The human body produces and destroys 15 million blood cells every second.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.