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• Influenza - Wikipedia, the free encyclopedia

  Influenza, commonly known as flu, is an infectious disease of birds and mammals caused by RNA viruses of the family Orthomyxoviridae (the influenza viruses).

• CDC - Influenza (Flu)

  CDC Centers for Disease Control and Prevention Influenza Flu Homepage ... Seasonal Flu. Influenza (the flu) is a serious disease. Each year in the United States, on average:

• Influenza.com, Flu Information & Influenza Prevention

  Influenza has a major impact on your health. Influenza provides information to help identify and protect against the flu virus.

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