Influenza pandemic

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Notion

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Science and technology

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What Wikipedia says

An influenza pandemic is an epidemic of an influenza virus that spreads across a large region (either multiple continents or worldwide) and infects a large proportion of the human population.

Excerpt from the Wikipedia article “Influenza pandemic”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: (Image: courtesy of the National Museum of Health and Medicine, Armed Forces Institute of Pathology, Washington, D.C., United States.), CC BY 2.5, via Wikimedia Commons.