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Avian Influenza: The Virus & Its Spread

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• Influenza Viruses
  Info about the types of flu viruses & how they can change over time
• Avian Influenza A Viruses
  Info about the different types of viruses that can cause avian influenza
• Spread of Avian Influenza Viruses among Birds
  How the disease spreads from bird to bird among both wild birds & poultry
• Transmission of Influenza A Viruses Between Animals and People
  How avian flu can spread to humans
• See also Avian Influenza Outbreaks

Navigation for the CDC Avian Flu Website

• Influenza (Flu)

• Avian Flu
  • What You Should Know
    • Key Facts
    • Current Situation
    • Infection in Humans
    • Q & A
  • Specific Topics
    • The Virus & Its Spread
    • Prevention
    • Outbreaks
  • Info for Specific Groups
  • References
  • Related Links
• Seasonal Flu
• Pandemic Flu
• Swine Flu

“Safer Healthier People”Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A.
800–CDC–INFO (800-232-4636), 888–232–6348 (TTY), cdcinfo@cdc.gov