A child in Montreal has been diagnosed with measles, according to public health

On Tuesday, officials were notified of a case of measles in a Montreal child.

According to the Montreal Public Health Organization, the infection may have been contracted during a trip to Africa and the infectious period is believed to have lasted from January 29 to February 6.

Back in Montreal, the boy went to school on January 29, went to a medical clinic on January 31, and visited two pediatric hospital emergency rooms between January 31 and February 2.

“All contacts in these environments are being contacted,” Public Health said in an email Wednesday.

No additional measles cases have been reported in Montreal since Tuesday.

The disease is highly contagious. Symptoms usually begin with a fever, cough, and runny nose, followed by a red rash a few days later.

According to Canada's official immunization guidelines, one dose of measles vaccine in children aged 12 to 15 months is estimated to be 85-95% effective, and two doses are estimated to be nearly 100% effective.

Public health did not immediately confirm whether the infected child in Montreal had been vaccinated.