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Did you know?
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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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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The horizontal fraction bar was introduced by the Arabs.
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Everyone has one nostril that is larger than the other.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.