Toronto Public Health (TPH) said passengers may have been exposed to measles on Wednesday if they were on a Turkish Airlines flight or passing through Terminal 1 at Pearson International Airport.
The public health unit said it is investigating a case of measles in a person who arrived at Terminal 1 on Turkish Airlines flight TK17 from Istanbul to Toronto at 5:30 p.m.
TPH said it urges anyone who thinks they may have been exposed to the virus to check their vaccination records and monitor for symptoms until Feb. 12.
People who have not received two doses of the measles vaccine or who have not had measles before are at risk of infection.
Symptoms may include fever, runny nose, cough, red eyes, a red rash that starts on the face and spreads over the body, and small blue-white spots on the inside of the mouth and throat.
Measles is a highly contagious virus that can survive in the air or on surfaces for up to two hours, TPH said.
People can become infected if they breathe in contaminated air or touch an infected surface and touch their eyes, nose, or mouth.
People born in the 1970s or later need two doses of measles vaccine for best protection if they have not had the virus. Anyone born before the 1970s can contract measles, as the virus was common at the time.
