Health authorities in Ontario’s Peel Region are probing a newly reported case of measles, saying some travellers who were at Toronto Pearson Airport last weekend may have been exposed to the airborne disease.
PPH is advising anyone who was at the exposure sites to confirm they and their family members are up-to-date with their measles vaccinations and to monitor themselves for possible symptoms until May 24.
“Peel Public Health directly contacts people who were at exposure sites if possible,” the department said. “Anyone experiencing symptoms should contact their health care provider, or if not available, Peel Public Health as soon as possible to get advice. Do not attend work or school.”
Measles is a highly contagious disease that poses the risk of serious health complications. It spreads more easily to those who have not been vaccinated for measles or have not previously had the disease, with symptoms appearing seven to 21 days after infection, PPH said.
Measles Spreading
Measles was eradicated nationwide in 1998 due to vaccination, but since the disease remains endemic in other parts of the world, travel-related cases continue to be seen in Canada, says Infection Prevention and Control Canada (IPAC).“Due to an increase in measles activity globally Canada has begun to see more travel-related cases,” IPAC said. “These cases can spread rapidly in underimmunized communities.”
There have been six confirmed cases of measles in Peel so far this year and there were three cases in 2024, PPH said. Out of Peel’s six cases, three were associated with travel, while the remaining three stemmed from close contacts or community transmission.
Peel’s cases have not been linked to the ongoing multi-jurisdictional measles outbreak in Ontario, the department said.
Ontario Public Health said the province’s multi-jurisdictional measles outbreak was traced back to a travel-related case in New Brunswick last October.
“The increase in the number of outbreak cases and the geographic spread in recent weeks is due to continued exposures and transmission among individuals who have not been immunized.”
There have been 1,019 confirmed and 158 probable cases of measles so far this year in Canada.
After Ontario, Alberta has had the second highest incidence of measles with 120 cases followed by Quebec with 36.