The WHO is set to announce officially that novel H1N1 or swine flu has reached official pandemic status. That is a phase six. This is the first influenza pandemic since the Hong Kong flu of 1968.

A pandemic declaration is based on the spread of the illness and not necessarily upon how deadly it is. Of the four influenza pandemics in modern times, 1918 Spanish Flu, the 1957 Asian Flu and the 1968 Hong Kong Flu, this outbreak appears to be the mildest. That could change but for now we have an influenza pandemic from a mild strain.

This declaration puts national governments on the spot. Most have prepared a pandemic flu plan with the steps that they would take when a pandemic is declared. For many nations, this means expenditure of money and resources they do not have. As with many international agreements, the wealthier countries are far readier and able to comply.

The United States plan can be found at PandemicFlu.gov. The plan provides for eventualities such as a very deadly illness that might require internal travel restrictions and quarantines.

The Centers for Disease Control (CDC) are your best source for authoritative information about influenza, swine flu, and the steps you should be taking.