Scientists Still Baffled About Origins of Swine Flu
CDC report shows 11 cases of similar strain since 2005
Posted May 8, 2009
On Thursday, the World Health Organization was reporting almost 2,400 confirmed cases of swine flu in 24 countries, with Canada, Spain and the United Kingdom having the most cases outside of Mexico and the United States.
Dr. Carolyn Bridges, a medical epidemiologist also with CDC NCIRD, said that experts would be watching developments in the southern hemisphere closely. "This may give us some clues as to what we might expect in upcoming winter months."
More information
The U.S. Centers for Disease Control and Prevention has more on the swine flu.
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