TORONTO – The Public Health Agency of Canada says this year’s first human case of West Nile virus acquired within the country has been confirmed in Toronto.

The confirmation 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.

The virus is transmitted to humans through infected mosquitoes.

PHAC’s West Nile surveillance report says that as of July 12, two other Canadian residents were infected this year while travelling outside of the country.