> The cases are not comparable because if an at-will employee loses a job with one employer, the employee can often find a job with another employer.

And so can anyone fired for not begin vaccinated, since there are many more jobs that don't require a vaccine than those that do.

> The cases are not comparable because, as far as I know, there is no testing option in the Canadian regulation.

It depends which jobs we're talking about. Make so mistake, this "trucker" protest has been coopted by basically anyone mad about vaccines. So for instance Alberta healthcare workers do not have to get vaccinated, but are subject to periodic testing instead.