Marie-Pierre Blier with the Quebec health department says four cases have been confirmed in the province as of Friday in connection to an outbreak that began last month. She says all of the confirmed cases acquired measles in the province, with the first person exposed to someone who lives outside Canada but travelled to Quebec while contagious.

Quebec’s health department is warning people who may have been exposed to measles in several regions of the province to monitor for symptoms amid a new outbreak of the disease.

Quebec public health confirmed that officials are monitoring a measles outbreak that began in December in Montreal, Laval and the Laurentians.