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Influenza E-Briefs

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September 2015 Influenza E-Brief

Influenza (the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. Some people, including older people, young children, and people with certain health conditions are at a higher risk for serious flu complications. The best way to prevent the flu is by getting vaccinated each year.


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  • Page last reviewed: September 18, 2015
  • Page last updated: September 18, 2015
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