Flu's Severity Studied

The World Health Organization raised its pandemic threat level from 3 to 4 on Monday - two levels below a full-scale pandemic - in response to a unique virus not seen in pigs or humans before. A look at what is known about the virus.

SOURCE: CDC and Prevention, NIAID, WHO | BY BRENNA MALONEY AND LAURA STANTON - The Washington Post - April 29, 2009

This Story CDC Says Flu Responses Will Vary Article \| The acting head of the Centers for Disease Control and Prevention said yesterday that there is no single best way for communities to respond to the growing outbreak of swine flu, and he played down the role the nation's chief public health agency will play in managing the illness around the country. : Swine Flu: Worldwide Outlook Flu's True Severity Is Still Unknown Bush Team Strategy Now Obama's Swine Flu Playbook Many States Do Not Meet Readiness Standards Heat, Closures, Flu Spur Some to Flee Mexico City Swine Flu Spreads Across D.C. Region Va. Man and Woman Contracted Virus Separately in Mexico Hundreds of Schools, Most in Tex., Shut New Swine Flu Cases Confirmed in U.K., Netherlands, Switzerland Forget Germs. The Real Contagion Is Our Paranoia New Blog: Swine Flu Report Questions and Answers About Swine Flu Countries Take Action Against Swine Flu Swine Flu Hinders Tourism in Mexico Flu's Severity Studied Swine Flu Videos Interactive Map: Distribution of Cases Swine Flu: Your Experiences Full Coverage: Swine Flu Officials Warn of Pandemic Alert Level Raised to 5 Making a Flu Vaccine Antiviral Stockpiles		Network News X Profile View More Activity TOOLBOX E-Mail This Reprints		More on washingtonpost.com • More World News » washingtonpost.com
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