10 measles cases identified in Quebec, 7 in Montreal, public health officials say

Quebec's public health director is asking Quebecers to make sure they and their children are properly vaccinated against the measles, as cases of the virus are on the rise in the province, especially in Montreal. 

Dr. Luc Boileau said health officials have so far counted 10 measles cases in Quebec. At least three are related to international travel, but he said a small number of cases are suspected to have been caused by community transmission. 

"That's what worries us," Boileau said in a news conference Monday with Montreal's public health director, Dr. Mylène Drouin, and a microbiologist and pediatric infectious diseases specialist, Dr. Caroline Quach-Thanh. 

"Measles is more contagious than COVID. The majority of people who are in contact with measles and are not vaccinated will contract the virus," he said. 

Seven of the province's 10 cases are in Montreal, which has a lower vaccination rate than some other regions, though the rates across the province vary greatly, Boileau said.

Boileau said "vaccination fatigue" and a rise in cases in Europe and other countries is leading to the transmission of measles cases in Canada. 

"We want to insist on vaccination. It's free, safe, efficient and acts quickly," he said. "We're not in the same situation as we were with COVID, where we had to take significant public health measures, but there is a real concern."

The last known case in Quebec, according to Drouin, was in 2019. 

"Seven or 10 may not seem like a lot, but it's an illness we're working on eliminating," Drouin said. 

The measles vaccine is covered by Quebec's immunization program. The Health Ministry's goal is to see every region reach a 95 per cent vaccination rate. 

Drouin said vaccination rates at Montreal schools hover around 80 per cent. Montreal public health is targeting schools with low rates to urge parents to have their children vaccinated, even in some cases calling individual families, Drouin said. 

The two-dose vaccine against measles is more than 95 per cent effective at preventing infection, according to Montreal Public Health.

Measles is highly contagious. The virus can remain active and contagious for up to two hours in a room even after an infected person has left, and it has a long incubation period — usually between 10 and 14 days. Its symptoms include fever, cough and a bumpy, red rash. 

Common complications are ear infections and diarrhea. In rare cases, measles can be fatal. Dangerous complications can occur in young infants as well as unvaccinated pregnant people and people with low immunity.