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Mosquitoes in Toronto, Vaughan test positive for West Nile virus

TORONTO AND YORK REGION, CANADA, JUL 18 – Three batches of mosquitoes tested positive for West Nile virus during annual surveillance, prompting health officials to advise vigilance to prevent human infections this summer.

Summary by City News
Health officials will continue to monitor for signs of West Nile activity and urge residents to remain vigilant throughout the summer.

3 Articles

CBC NewsCBC News
Lean Left

Mosquitos in Toronto test positive for West Nile virus, but city says risk of infection is low

Toronto Public Health has confirmed some mosquitos in the city have tested positive for West Nile virus, but say the risk of infection is low if precautions are taken.

·Canada
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City NewsCity News
Center

Mosquitoes in Toronto, Vaughan test positive for West Nile virus

Health officials will continue to monitor for signs of West Nile activity and urge residents to remain vigilant throughout the summer.

·Toronto, Canada
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City of TorontoCity of Toronto

Toronto Public Health confirms first mosquitoes to test positive for West Nile virus in 2025

News Release July 18, 2025 Toronto Public Health (TPH) has received confirmation that three mosquito batches collected in the city of Toronto have tested positive for West Nile virus, marking the first positive findings this year. West Nile virus is transmitted to humans through the bite of an infected mosquito. TPH conducts annual mosquito surveillance […]

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City News broke the news in Toronto, Canada on Friday, July 18, 2025.
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