West Nile virus (WNV) is a potentially serious illness that is transmitted to humans through the bite of an infected mosquito. Although the risk of becoming infected with WNV in Toronto is low, protecting yourself against mosquito bites can help reduce the risk even further. While anyone can be infected with WNV, the chances of having a severe illness are greater as you get older or if you have a weakened immune system. Children are not at greater risk of illness from WNV.

Reducing Risk of West Nile Virus

Avoid mosquito bites and eliminate stagnant water on your property.

City Larviciding

City catch basins are treated with larvicide to prevent mosquito development.

West Nile Virus Surveillance & Reporting

Information on human cases of West Nile virus and adult mosquito surveillance for Toronto.

Information for Horse Owners

West Nile virus and Eastern Equine Encephalitis in horses and other animals