About Pandemic Influenza

Seasonal Flu

Flu refers to illnesses caused by a number of different influenza viruses. Flu can cause a range of symptoms and effects, from mild to lethal.

Most healthy people recover from the flu without problems, but certain people are at high risk for serious complications.

Flu symptoms may include fever, coughing, sore throat, runny or stuffy nose, headaches, body aches, chills, and fatigue.

Annual outbreaks of the seasonal flu usually occur during the late fall through early spring. Most people have natural immunity, and a seasonal flu vaccine is available. In a typical year, approximately 5 to 20 percent of the population gets the seasonal flu and approximately 36,000 flu-related deaths are reported.


Pandemic Flu

A flu pandemic occurs when a new influenza A virus emerges for which there is little or no immunity in the human population; the virus causes serious illness and spreads easily from person-to-person worldwide.

A pandemic is a global disease outbreak. An influenza pandemic occurs when a new influenza A virus emerges for which there is little or no immunity in the human population, begins to cause serious illness and then spreads easily person-to-person worldwide. A pandemic is determined by spread of disease, not its ability to cause death.

To learn more about seasonal flu and pandemic flu please visit the following links:



For additional information on planning for a pandemic event, please visit the following: