CDC West Nile Virus HomepagePosted: November 13, 2012
As of November 6, 2012, 48 states have reported West Nile virus infections in people, birds, or mosquitoes. A total of 5,054 cases of West Nile virus disease in people, including 228 deaths, have been reported to CDC. Of these, 2,559 (51%) were classified as neuroinvasive disease (such as meningitis or encephalitis) and 2,495 (49%) were classified as non-neuroinvasive disease.
The 5,054 cases reported thus far in 2012 is the highest number of West Nile virus disease cases reported to CDC through the first week in November since 2003. Almost 80 percent of the cases have been reported from 12 states (Texas, California, Louisiana, Mississippi, Illinois, South Dakota, Michigan, Oklahoma, Nebraska, Colorado, Ohio, and Arizona) and over a third of all cases have been reported from Texas.