Illustration copyright 2005. Adapted from the U.S. Centers for Disease Control and Prevention. Available online: http://www.cdc.gov
Mosquitoes become infected with West Nile virus when they bite infected birds. And then they may transmit the virus to humans and animals when they bite to take blood.
Last Revised: August 10, 2012
Author: Healthwise Staff
Medical Review: E. Gregory Thompson, MD - Internal Medicine & W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
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