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Total neuroinvasive cases reported in the United States, 2009-2018

A total of 12,835 neuroinvasive cases were reported in the United States from 2009 to 2018. Incidence is expressed as cases per 100,000 population. Incidence calculated using U.S. Census Bureau population estimates for July 1 of each year of the reporting period. Cutpoints determined by Jenks Natural Breaks Classification method, then rounded for ease of display. (Source: McDonald E, Mathis S, Martin SW, Staples JE, Fischer M, Lindsey NP. Surveillance for West Nile Virus Disease - United States, 2009-2018. MMWR Surveill Summ 2021;70(1):1-15.)