West Nile Virus Annual Incidence (image) National Center for Atmospheric Research/University Corporation for Atmospheric Research Share Print E-Mail Caption This map shows the average number of annual cases of West Nile virus with neurological symptoms that were reported to the CDC from 1999 to 2013. Close to 40,000 cases were reported during that period, with more than 1,600 deaths. Credit Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.