New measles case confirmed in Montreal

Montreal Public Health announced Sunday that a new case of measles has been confirmed in the city. 

The authority said an unvaccinated adult contaminated another adult at a location outside Montreal.

"According to available information, these two cases are part of the measles transmission chain initiated by the case imported from a foreign country who attended the NATO Parliamentary Assembly at the Palais des congrès de Montréal last November," it wrote. 

A "very large" number of Montreal locations were possibly exposed to the measles case, including:

• Herzl Clinic on Jan. 1 between 4:30 p.m. and 7 p.m.
• Jewish General Hospital (Pavilion D, first floor, microbiology-infectiology outpatient clinic's waiting room and office B-010) on Jan. 1 between 5:15 p.m. and 8 p.m.
• Bleu & Persillé on Jan. 3 between 2 p.m. and 4:30 p.m.
• Boulangerie Le Toledo on Jan. 3 between 2:30 p.m. and 5 p.m.
• Fairmount Bagel on Jan. 3 between 3 p.m. and 5:30 p.m.
• Poissonnerie Falero on Jan. 3 between 3:30 p.m. and 6 p.m.

In December, Montreal Public Health reported that hundreds of people had been exposed to measles between Nov. 23 and Nov. 26 during and after a NATO conference held in the city. One of the participants had received a measles diagnosis after returning to their home country and would have been contagious while in Montreal.

Other places of possible exposure can be found on Quebec's measles outbreak website. Quebec's Health Ministry advises Quebecers to consult the page regularly, as information may be updated.

Symptoms of measles include high fever, cough, runny nose, red eyes and general malaise, followed by redness of the face and body.

Fifty-six confirmed cases of measles were reported in Quebec in 2024, including 51 in the first outbreak between February and June.