Confirmed Swine Flu Cases Jump

WHO investigators find 257 confirmed cases in 11 countries
By Rob Quinn,  Newser Staff
Posted Apr 30, 2009 8:00 PM CDT
Confirmed Swine Flu Cases Jump
Beth Weiman, a lead microbiologist, tests a suspected swine flu sample at the Washington State Public Health Laboratories yesterday.   (AP Photo/Elaine Thompson)

The number of confirmed swine flu cases worldwide jumped from 147 to 257 yesterday, according to the World Health Organization. Hundreds more suspected cases are still being investigated. The jump in confirmed cases is likely attributable to investigators working through their backlog of specimens rather than rapidly mounting incidents of the disease, said a WHO official. Eleven countries have confirmed cases and the WHO's threat level remains at 5 on a 6-step scale.


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