Peel Region confirms first human case of West Nile virus for 2026
Peel Public Health announced Wednesday that infected mosquitoes remain active across Brampton, Mississauga, and Caledon, with preventive measures recommended as the virus spreads in the region.
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Peel Public Health confirmed Wednesday the first human case of West Nile virus in Peel Region for 2026. The region first identified infected mosquitoes on July 27, while Toronto Public Health reported the first human case of the season on July 30.
West Nile virus spreads through the bite of an infected mosquito. Most people infected do not develop symptoms, but possible symptoms include fever, headache, body aches, fatigue, nausea, vomiting, and skin rash. The virus can rarely cause serious illness such as swelling of the brain or spinal cord. Older adults, people with weakened immune systems, and those with certain chronic conditions face higher risk of serious complications.
Dr. Alexa Caturay, Peel Region Medical Officer of Health, said in a statement Wednesday that "infected mosquitoes remain active in our community." Peel Public Health monitors mosquito activity across Brampton, Mississauga, and Caledon through an annual surveillance program.
The health unit recommends wearing light-coloured, long clothes and applying approved insect repellent, with extra precautions between dusk and dawn when mosquitoes are most active. For infants younger than six months, do not use insect repellent containing DEET or icaridin; use a mosquito net when outdoors instead. Peel also recommends removing or draining items that collect standing water, as stagnant water lasting more than seven days is an ideal breeding site. Residents can register online to receive email notifications about locations where mosquitoes tested positive for the virus.
At a glance
Where are infected mosquitoes active in Peel Region?
Infected mosquitoes remain active across Brampton, Mississauga, and Caledon, according to Peel Public Health monitoring.
How does West Nile virus spread?
West Nile virus spreads through the bite of an infected mosquito. Most infected people do not develop symptoms.
Who is at higher risk of serious West Nile virus complications?
Older adults, people with weakened immune systems, and those with certain chronic conditions face higher risk of serious complications from West Nile virus.
What precautions does Peel Public Health recommend?
Peel Public Health recommends wearing light-coloured, long clothes and applying approved insect repellent, especially between dusk and dawn. For infants under six months, use a mosquito net instead of repellent containing DEET or icaridin. Residents should also remove or drain items collecting standing water, since stagnant water lasting more than seven days is an ideal breeding site.
