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Preparing Schools For The Flu

Preparing Schools For The Flu. Revised August 2012. Influenza (The Flu) . The flu is a contagious, respiratory infection caused by influenza viruses. Flu can be mild to severe, and at times can lead to death. On average, each year 5% to 20% of the population gets the flu. How Flu Spreads.

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Preparing Schools For The Flu