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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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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Thyroid conditions may make getting pregnant impossible.
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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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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.