It doesn't matter if you've been naughty or nice - you can still get the flu for Christmas.
The city's emergency room doctors and public health officials are warning the public that flu and gastro season is upon us, with cases of infection expected to peak between mid-January and mid-February.
They are asking people to get vaccinated and, if they do get sick, to stay away from hospitals.
The worry is flu and gastro sufferers infecting other, more vulnerable patients.
Instead, people showing symptoms that include fever, aches and pains and general low-intensity misery should stay home, drink lots of fluids and get plenty of rest.
If they feel they need to see a medical professional, they should first call Info-Sante at 811, or visit their local CLSC or family doctor.
Royal Victoria's head of emergency Dr. Frederick Dankoff says even otherwise healthy people should get shots.
"The less we have healthy people running around passing the flu, the less we put at risk the vulnerable: the very young, the elderly and those with chronic diseases," he says.
Montreal has almost half a million vaccines on hand and can get more if necessary.