It has to do with the Emergencies Act. I don't know if I can make it super quick but I'll try to summarize it.
We know that the Emergencies Act is not just a modernized War Measures Act, but actually deals with broader emergencies, like a public welfare emergency. I'd like to read the definition of that.
A public welfare emergency is defined under the act as an emergency that is caused by a “real or imminent”...“disease in human beings” and that “results or may result in a danger to life or property, social disruption or a breakdown in the flow of essential goods, services or resources, so serious as to be a national emergency.” The act defines a national emergency as an “urgent and critical situation of a temporary nature that (a) seriously endangers the lives, health or safety of Canadians...”.
It gives the government a number of powers, many of which would be—