Toronto Public Health reports its 1st human case of West Nile virus this year

That means the Toronto case could be the first person infected within Canada this year. The Canadian Press has reached out to PHAC for confirmation.

PHAC’s report says two people were infected this year while travelling outside of the country.

Its surveillance map shows West Nile detections in two mosquito pools in Ontario and one in Manitoba.

Toronto Public Health says symptoms usually begin between two to 14 days after a mosquito bite and can include fever, headache, nausea, vomiting, body aches, skin rash, swollen lymph glands or a stiff neck.

It says older adults and people with compromised immune systems are at higher risk of severe illness.

People can prevent infection with the virus by avoiding mosquito bites — wearing light-coloured long sleeves and long pants, using Health Canada-approved insect repellent, getting rid of standing water in buckets, planters, pool covers and other containers to eliminate mosquito breeding grounds and putting tight-fitting screens on all windows.

This report by The Canadian Press was first published July 31, 2025.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

Nicole Ireland, The Canadian Press

by Canadian Press

Toronto Public Health reports its 1st human case of West Nile virus this year

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