Fact Sheet: What is Avian Influenza A (Bird Flu)

Publication Summary

This fact sheet overviews H₅N₁ AI A – a rare, highly pathogenic avian influenza A virus that primarily affects birds but can also infect humans and other mammals, posing a significant public health risk.

Questions answered include:

  • How is H₅N₁ AI A spread?
  • Who is at the highest risk?
  • What are the signs & symptoms?
  • How is H₅N₁ AI A diagnosed?
  • Is there a vaccine?
  • What is the risk to Canadians?
  • What can be done to prevent & control H₅N₁ AI A?
  • What has been Public Health Agency of Canada’s response to H₅N₁ AI A?