Toronto Public Health says it is investigating two cases of measles in adults.
Both cases have been confirmed to be travel related.
The agency says that members of the public may have been exposed to the measles virus in several locations on May 5 and May 8.
Those locations include Pearson International Airport, Terminal 1, between 6 p.m. and 10:30 p.m. on May 5 and between 5 p.m. and 7:30 p.m. on May 8. Passengers on Air Canada flight AC848 that left Toronto at 8:40 p.m. on May 5 and arrived in London Heathrow airport at 8:35 a.m., on May 6, and Air Canada flight AC849 from London Heathrow arriving in Toronto at 5 p.m. on May 8 may have also been exposed.
Two other locations include Remely’s Restaurant at 4830 Sheppard Ave. E., between 10 a.m. and 7 p.m. on May 5, and the Toronto Zoo between 1:30 p.m. and 5 p.m. on May 8.
Public Health officials are reminding residents to ensure they are protected against measles before travelling as the virus is circulating in many countries.