West Nile Fever in USA - weekly update

As of September 4, 2012, 48 states have reported West Nile virus infections in people, birds, or mosquitoes. A total of 1,993 cases of West Nile virus disease in people, including 87 deaths, have been reported to the US Centers for Disease Control and Prevention.

The 1,993 cases reported thus far in 2012 is the highest number of West Nile virus disease cases reported since West Nile virus was first detected in the United States in 1999. Over 70 percent of the cases have been reported from six states (Texas, South Dakota, Mississippi, Oklahoma, Louisiana, and Michigan) and almost 45 percent of all cases have been reported from Texas.

Since there is no vaccine or treatment for infections with West Nile fever virus, travellers to areas where the West Nile Fever virus has been found can reduce their risk of exposure to this virus by taking all necessary precautions to avoid mosquito bites.

Visit our Health Library for more information on exposure to and the prevention of West Nile Fever.

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