Quebec has confirmed a measles outbreak, escalating the number of cases from three to six recently. This increase includes at least one confirmed case in Montreal. The outbreak has notably affected several regions, including Lanaudière, the Laurentians, and Laval.
Details of the Measles Cases
The Regional Public Health Directorate of Montreal reported on December 17, 2025, that an infected individual resides in the city. Additional locations frequented by infected individuals include various places in the Laurentians and Montreal.
Locations and Dates of Concern
Individuals who have not been immunized and visited the following locations should monitor their symptoms:
- Up Pediatric Emergency Centre in Saint-Eustache on November 28
- Santé Jeunesse Clinic on Boulevard Pierrefonds, Montreal
- Walmart on Boulevard Langelier, Saint-Léonard
- Adonis Market on Boulevard des Roseraies, Anjou
- Emergency Department of Maisonneuve-Rosemont Hospital
A comprehensive list of dates potentially involving measles exposure is available on the Quebec government’s website. The outbreak traces its origins back to late November. It follows another outbreak that occurred from December 2024 to April 2025. In total, nearly 40 cases have been reported in the province this year.
Public Health Recommendations
The provincial government emphasizes that individuals who are vaccinated against measles face minimal risk if exposed to the virus. However, they urge the public to be vigilant for symptoms of the disease. Common symptoms include:
- Fever
- Runny nose and congestion
- Cough
- Conjunctivitis
- Light sensitivity
- General malaise
Who is Considered Unprotected?
Individuals at increased risk include those who:
- Were born before 1970
- Have serology indicating the presence of measles antibodies
- Possess medical documentation confirming prior measles infection before January 1, 1996
- Can provide written proof of measles vaccination
Non-immune individuals exposed to measles are advised to self-isolate at home starting five days after their first exposure and for the following 14 days after their last exposure. Vaccination and symptom monitoring are highly recommended.
