Section 1. Avian Influenza Facts

  1. Source and Transmission
  2. Agent Characteristics
  3. Virus Survival
  4. Clinical Signs in Birds

What is Avian Influenza?

Avian is another word for bird.

, or flu, is a type of virus that causes disease in many different animals and people. A virus is a tiny germ that replicates, or copies itself, inside living cells.
  • Avian influenza, or AI, is caused by type A influenza virus.
  • The avian flu virus is different from the flu virus that normally makes people sick.

Influenza Virus
CDC Image Library: Cynthia Goldsmith