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Cold, Flu, & Cough Health Center

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WHO Declares Swine Flu Pandemic

Pandemic Status Means Swine Flu Bug Is More Widespread, Not More Severe
WebMD Health News
Reviewed by Louise Chang, MD

June 11, 2009 - It's official: We're in a swine flu pandemic, the World Health Organization declared today.

"The world is now at the start of the 2009 influenza pandemic," WHO Director-General Margaret Chan, MD, said at a news conference.

Swine Flu Outbreak: Get the Facts

Swine Flu Slideshow

Learn more about the H1N1 swine flu and see what you can do to stay healthy.

View the slideshow.

That sounds scary. But neither the H1N1 swine flu virus nor the disease it causes are any worse today than they were weeks ago.

The only thing that's changed is that the WHO now officially acknowledges that H1N1 swine flu is circulating in communities in widespread parts of the globe, and that all nations can eventually expect to see cases.

"This does not mean there is any difference in the severity of the flu. This is not, at this point, a flu pandemic that is anywhere as severe as the 1918 pandemic," said Thomas R. Frieden, MD, in his first news conference since taking over as director of the CDC.

The announcement also triggers the pandemic preparedness plans of nations not yet affected by swine flu. It will have little or no effect on the U.S., which since mid-April has been aggressively putting national pandemic plans into action.

"For all intents and purposes, the U.S. has been in a flu pandemic for some time," Frieden said. "But this means the virus is here and is here to stay, and we must prepare our response."

U.S. actions include mobilizing the national stockpile of flu medications; issuing guidance to families, communities, and health workers; holding regular news briefings; and, most dramatically, moving ahead rapidly with the development of a swine flu vaccine.

"Our key goals will be to find where virus is spreading and reduce its impact, particularly in those with underlying health conditions and in infants," Frieden said.

In making the WHO pandemic declaration, Chan warned nations that have not yet seen swine flu infections that the pandemic is coming. And she warned nations such as the U.S., where in some areas the first wave of the pandemic is subsiding, to remain vigilant for a second wave of infections.

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