Primary Navigation for the CDC Website
CDC en Español


The information on CDC’s avian influenza website is no longer being updated. Posted content is being maintained “live” for background purposes, but readers should understand that content may not be current. For more up-to-date information on human infections with avian influenza A (H5N1) viruses, please see the new CDC avian influenza web site and the the World Health Organization (WHO) Avian Influenza Situation Update page. For background information regarding recent media reports of changes in circulating H5N1 viruses, please see the WHO and World Organization for Animal Health (OIE) statements on this issue.

Photo of chickensAvian influenza virus usually refers to influenza A viruses found chiefly in birds, but infections can occur in humans. The risk is generally low to most people, because the viruses do not usually infect humans. However, confirmed cases of human infection have been reported since 1997.…more

What You Should Know

Specific Topics

Information for Specific Groups

Additional Resources


  • Email this page
  • Printer-friendly version
  • Get email updates New!
  • RSS feedRSS feed


  • Español (Spanish)
  • Chinese (Chinese)
  • Vietnamese (Vietnamese)

Contact CDC

News & Highlights

Navigation for the CDC Avian Flu Website

• Influenza (Flu)

Additional Navigation for the CDC Website

“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),