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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.