Toronto Public Health reports first human case of West Nile virus in 2026

Toronto Public Health (TPH) has reported its first human case of West Nile virus in an adult resident this year. West Nile virus is an infection transmitted to people through the bite of an infected mosquito.

Residents can take the following steps to help protect themselves from West Nile virus:

• Wear light-coloured, long-sleeved shirts and pants when outdoors.
• Apply a Health Canada-approved insect repellent and follow the manufacturer’s instructions.
• Take extra care during peak mosquito-biting time (dusk and dawn) by using insect repellent and wearing protective clothing.
• Remove standing water from one’s property where mosquitoes can breed.
• Ensure screens are tight-fitting on windows and doors.

Symptoms of West Nile virus usually develop between two and 14 days after a person is bitten by an infected mosquito.

Symptoms can include:

• Fever
• Headache
• Nausea
• Vomiting
• Body aches
• Skin rash
• Swollen lymph glands
• Stiff neck

 

Older individuals and people with compromised immune systems are at higher risk of severe illness.

More information about West Nile virus and ways to reduce the risk of infection is available on the City’s webpage: www.toronto.ca/west-nile-virus.

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