What is the H5N1 virus, sometimes called the "avian flu"? What steps have been taken to prevent it from sprea

Answer 1

Avian influenza is an infection caused by avian (bird) influenza (flu) viruses. These influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated birds, including chickens, ducks, and turkeys, very sick and kill them.

http://www.cdc.gov/flu/avian/gen-info/facts.htm