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There are approximately 3 million unintended pregnancies in the United States each year.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.