Update: Swine-Origin Influenza A (H1N1) Virus -- United States and Other Countries

May 2009
MMWR: Morbidity & Mortality Weekly Report;5/1/2009, Vol. 58 Issue 16, p421
The article provides an update on the cases of respiratory infection with a swine-origin influenza A (H1N1) virus present in different countries. As of April 29, 2009, there were 91 confirmed cases and one death in the United States due to this virus. There were 26 cases in Mexico, 13 in Canada, and five in the United Kingdom.


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