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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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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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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.