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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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.