Reference Terms
from Wikipedia, the free encyclopedia

Influenza pandemic

An influenza pandemic is a large scale epidemic of the influenza virus, such as the 1918 Spanish flu.

The World Health Organization (WHO) warns that there is a substantial risk of an influenza pandemic within the next few years.

One of the strongest candidates is the A(H5N1) subtype of avian influenza.

Note:   The above text is excerpted from the Wikipedia article "Influenza pandemic", which has been released under the GNU Free Documentation License.
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