Yesterday, there were 80 confirmed cases of measles in the region. All of the people infected with the disease were unvaccinated.
The first Quebecers to contract measles were exposed while visiting Disneyland in California. Public health officials said Wednesday that all of the 119 cases are related.
Dr. Muriel Lafarge said the public health department was notified of the situation at the school yesterday.
She said a child visited the school on Feb. 27 while contagious, exposing up to 700 students and staff members to measles.
Three pavilions at the school are concerned: Wilfrid Gervais, St-Pierre and Marie-Charlotte.
Lafarge said a protocol has been put in place to mitigate the risk. The protocol involves identifying all the unvaccinated people at the school and offering them the vaccine.
Those who refuse will be removed from the school for 14 days.
Measles is a highly contagious infection that causes high fever, a distinctive rash and a runny nose. Complications can include pneumonia, deafness and death in about one or two cases per 1,000 infected individuals.