For an introduction to avian influenza and the highly pathogenic H5N1 strain click here.

Official case count

• Confirmed human cases of avian influenza A (H5N1)
  Updated regularly - World Health Organisation (WHO)

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Situation updates

• Avian influenza: latest information
  Updated regularly - World Health Organisation (WHO) 

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Timeline of major events

• H5N1 avian influenza: timeline of major events
  Updated regularly - WHO 

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Selected scientific reviews of H5N1 influenza in humans

• Update on avian influenza A (H5N1) virus infection in humans
  Writing Committee of the Second World Health Organization Consultation on Clinical Aspects of Human Infection with Avian Influenz A (H5N1) Virus. N Engl J Med 2008 Jan 17;358(3)
• Avian Influenza (Bird Flu): Implications for Human Disease
  Updated regularly - Center for Infectious Disease Research and Policy (CIDRAP)