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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: Friday, September 23, 2016
 Positive to Date* †Nationwide Positive°
Humans69868
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<101
Female2410-192
Male4520-296
30-3912
Hospitalized2040-498
50-5914
Active Counties   26  60 and over26

Click here for data by county

Historical Data

wnvchart

deaths