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Cyanide works by making the human body unable to use oxygen.
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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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.