This map reflects surveillance findings occurring January 1, 2002 through December 31, 2002 as reported to CDC's ArboNET system for public distribution by state and local health departments.
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West Nile virus maps reflect surveillance reports released by state and local health departments to CDC's ArboNET system for public distribution. Map shows the distribution of human neuroinvasive disease (encephalitis and/or meningitis) incidence occurring during 2002 with number of human cases shaded according to incidences ranging from .01 to 9.99, 10 to 99.99, greater then 100, and WNV activity (human, mosquito, veterinary, avian and sentinel data).
detailing county-level human, mosquito, veterinary,
avian and sentinel data are published each week on
the collaborative USGS/CDC West Nile virus web site: http://diseasemaps.usgs.gov/
WNV Surveillance Maps detailing Neuroinvasive Disease Incidence additional years: