What is the bird flu virus that has made some domestic birds and humans sick?
In recent years, there has been growing concern about a particular strain of avian influenza virus – an H5N1 virus – that has spread through birds from Southeast Asia through Asia to parts of Europe and Africa. This strain has caused illness in some wild birds, but it has resulted in a high rate of death in domestic poultry. Millions of birds have been killed in an effort to prevent the spread of the virus.
