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Did you know?
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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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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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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
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Vaccines prevent between 2.5 and 4 million deaths every year.