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West Nile Virus Transmission Cycle

West Nile virus transmission cycle

Illustration copyright 2005. Adapted from the U.S. Centers for Disease Control and Prevention. Available online:

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.

ByHealthwise Staff
Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine
Specialist Medical ReviewerW. David Colby IV, MSc, MD, FRCPC - Infectious Disease
Last RevisedAugust 10, 2012

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