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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.