Featured Articles
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Information from CDC on all things related to COVID-19, the disease caused by the novel coronavirus.
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A timeline displaying key moments in the story of the COVID-19 pandemic.
Popular Articles
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Systems for developing and testing vaccines emerged after the 19th century, when many vaccines began to be used. The current system for developing, testing, and regulating vaccines developed during the 20th century as the groups involved standardized their procedures and regulations.
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A vaccine is a medical intervention, and as with any medical intervention, may have side effects. This article discusses side effects and adverse events related to vaccination.