Final Cumulative Maps & Data for 1999–2018, Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD), Centers for Disease Control, October 9, 2019
West Nile Virus: Blood Transfusion and Organ Donation, Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-Borne Diseases (DVBD), December 10, 2018