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Since 2015, West Nile Virus (WNV) surveillance in BC has been conducted through testing horses and birds that are sick or dead, and humans who have symptoms compatible with WNV. Blood and organ donations are also screened for WNV. Between 2004 and 2014, surveillance also included trapping and testing mosquitoes for WNV. 

As positives occur they will be posted here.

West Nile Virus in British Columbia (2009-2023)

WNV_activity_2022_public - 20230608_v2.jpg

*Map includes confirmed, locally acquired cases only, excludes travel-related cases.
**Horses (locally acquired), birds, or mosquitoes
updated: December 7, 2023
† Data from 2009 to 2023: sources:,,,

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SOURCE: Surveillance ( )
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