Note: Maps and information below is from the CDC.
States reporting confirmed West Nile virus infection in birds, mosquitoes,
animals, or humans, 1999-2001.
Note: The data presented reflect public reports by state and local
Map 3: Spread of West Nile virus by state, 1999-2002. West Nile Virus
Activity in the U.S. in Birds, Horses, Mosquitoes, Animals, or Humans.