UK bird flu outbreak confirmed as H5N1

From New Scientist: UK bird flu outbreak confirmed as H5N1

To go along with this news, some useful terms from Dictionary.app:

A disease that quickly and severely affects a large number of people and then subsides is an epidemic.

A disease that is continually present in an area and affects a relatively small number of people is endemic.

A pandemic is a widespread epidemic that may affect entire continents or even the world.