The world has seen three in the last century that left millions dead.
The U.S. Centers for Disease Control says it spreads easily and can sweep the world in a very short time.
The U.S. has been working the World Health Organization to detect and respond to outbreaks of influenza that could mutate into a flu pandemic and now the federal government wants states to be involved in that preparation.
"So I ask you to do this for your family, and your community are you ready?" said Gov. Otter in a radio ad.
"We will have another pandemic someday so if people can be prepared if they do have two weeks of food at home and if businesses are ready then we can possibly stop the spread of the disease within our communities and protect people," said Tom Shanahan, Idaho Department of Health and Welfare spokesman.
The media campaign in Idaho will wrap up at the end of October, but the Web site is permanent and will be updated with any new information about a flu pandemic.