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WHO | Global Outbreak Alert & Response Network

http://www.who.int/entity/ihr/alert_and_response/outbreak-network/en/i...

Global Outbreak Alert and Response Network (GOARN) (French) Download wmv 2Mb The Global Outbreak Alert and

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Influenza pandemic

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 population. There have been five major influenza pandemics in the last 140 years, with the 1918 flu pandemic being the most severe; this is estimated to have been responsible for the deaths of 50–100 million people. The 2009 swine flu pandemic resulted in under 300,000 deaths and is considered relatively mild.