This map reflects surveillance findings occurring January 1, 2001 through December 31, 2001 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 avian, animal, or mosquito infection occurring during 2001 with number of human cases if any, by state. If West Nile virus infection is reported to CDC from any area of a state, that entire state is shaded.
Avian, animal or mosquito WNV infections were reported to CDC ArboNET from the following states in 2001: Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Florida, Georgia, Iowa, Indiana, Illiniois, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, Tennessee, Virginia, and Wisconsin.
cases were reported in: Alabama, Connecticut, Florida, Georgia, Louisiana, Maryland, Massachusetts, New Jersey, New York, and Pennsylvania.
For information on WNV activity in Canada please see:
Surveillance Maps detailing human and animal activity additional years:
2010 by State|2010 by County
For these and other posted surveillance pages please visit the West Nile virus surveillance archives