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West Nile Virus

West Nile Virus was first isolated from a patient in the West Nile district of Uganda in 1937. Several outbreaks of WNV occurred in the Mediterranean Basin (an area stretching from Portugal to Jordan and Italy to Cape Verde) in the 1950s and 1960s. The United States' first WNV cases occurred in New York in 1999. North Dakota's first case occurred in August, 2002.

Current Data

 

2016 West Nile Virus Samples and Testing
Beginning: Wednesday, June 1, 2016
Through: Thursday, December 15, 2016
 Positive to Date* †Nationwide Positive°
Humans851789
Horses50
Dead Birds80
Mosquito Pools150
Other Veterinary10

* Results may change pending further investigation
† Confirmed and probable cases
° Reported to CDC

   
2016 WNV Human Summary
Total CasesAge Information
RangeCases
Gender<102
Female2810-192
Male5720-299
30-3912
Hospitalized2840-4910
50-5917
Active Counties   28  60 and over33

Click here for data by county

Historical Data