Pandemic influenza is a worldwide outbreak of disease that occurs when a new influenza A virus to which people have little or no immunity appears in humans then spreads easily from person to person. Currently, there is no pandemic flu or influenza.
Avian or "bird flu" is caused by avian influenza viruses, which occur naturally among birds.
The flu is a contagious respiratory illness caused by influenza viruses. In Kansas, the peak of the season is generally January or February. Vaccinations are available for seasonal flu in the fall of each year.