Avian Flu
(H5N1 Avian Influenza)

FAQS | Resources

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.

How are Pandemic, Avian, and Seasonal Flu Different?

Pandemic Flu: A flu pandemic is a global outbreak that occurs when a new influenza A virus causes serious human illness and spreads easily from person to person. Because people have not been infected with a similar virus in the past, most or all people will not have any natural immunity (protection) to a new pandemic virus. Currently, there is no influenza pandemic.

Avian Flu: Bird flu is caused by avian influenza viruses, which occur naturally among birds.

Seasonal Flu: The flu is a contagious respiratory illness caused by influenza viruses. In some persons, complications of influenza can be severe, including pneumonia or death.

Swine Flu: Swine flu is a respiratory disease of pigs caused by type A influenza