Potential Public Exposures to Measles in Waterloo Region

Last Updated: May 22, 2025 

For each reported case of measles, a public health investigation is completed to identify places where people may have been exposed to the measles virus.

If you were present at the locations below during the timelines noted, you may have been exposed to measles. The list will be updated as information becomes available.

Information about additional measles exposure locations in Ontario can be found at Measles Exposures in Ontario.

If you think you were exposed to measles, use the Measles Self-Assessment Tool to determine what you should do.

If you are planning to visit a health care provider and you have measles symptoms or have been exposed to measles, call ahead to inform the clinic so that they can take proper precautions in advance of your visit. 

Measles Self-Assessment Tool

For more information on symptoms and and how the measles virus spreads, visit the measles webpage.

NEW: Potential public exposures on Regional public transit are listed in a separate table. View the GRT/ION Potential Public Exposure Information.

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