West Nile Virus

• Toronto reports first human case of West Nile virus this year

  Toronto Public Health has confirmed the city's first human case of West Nile virus in 2026 as officials urge residents to protect themselves from mosquito bites.

  Health

  Jul 30
  
• West Nile virus is showing up across Ontario. What to know about the risk

  West Nile virus has been detected in mosquito pools in several Ontario communities, prompting renewed reminders to protect against mosquito bites as summer peaks.

  Health

  Jul 22
  
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• No need to panic, but West Nile threat very real, Manitoba health expert says

  Health experts say a confirmed case of West Nile Virus is connected to someone who travelled outside of Manitoba, but that doesn't mean there won't be homegrown cases this summer.

  Health

  Aug 13, 2025
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• Province of Manitoba to spray for mosquitoes in Winkler with West Nile risk high

  The province will begin spraying for mosquitoes in the city of Winkler, where there is a high risk of human exposure to West Nile Virus.

  Trending

  Aug 7, 2025
• Canada has its 1st case of West Nile this year. Here’s what to know about the virus

  Confirmation of the first human case of West Nile virus acquired in Canada this year arrived just in time for the August long weekend. Here's what you need to know about virus.

  Canada

  Aug 2, 2025
• West Nile virus confirmed in Toronto, Canada’s 1st human case this year

  The confirmation by PHAC comes after Toronto Public Health said its first laboratory-confirmed case of the virus in 2025 is an adult resident of the city with no travel history.

  Health

  Jul 31, 2025
• West Nile virus is back. Where it’s been found, and what you should know

  West Nile has been reported in mosquitoes found in Toronto, York Region and Niagara Region so far, but doctors are cautioning human cases could come soon.

  Canada

  Jul 23, 2025
• West Nile virus to spread to remote areas of Quebec due to climate change, study says

  A recent study suggests warmer temperatures could lead to a surge in West Nile virus cases and that it could spread to more remote regions of the province for the first time.

  Environment

  Jul 18, 2025
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• Calgary researchers using ‘citizen science’ for a study on invasive mosquitoes

  Calgary researchers are using 'citizen science' to help determine how an invasive species of mosquito, which is a carrier of the West Nile virus, can survive Alberta's winter.

  Science

  May 28, 2025
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• Toronto reports 1st probable human case of West Nile virus this year

  Toronto Public Health says in a news release on Friday that an adult resident contracted the virus.

  Health

  Aug 16, 2024