Why do we have some people who are exempt from quarantine (truck drivers for example) ? Are they immune ? Or perhaps the impact of virus coming from this type of people is insignificant ? Do we have some studies ?
Thanks.
The judgment or logic is not that some people are immune, but that some tasks and roles are essential to functioning of the country.
"Truck driver" here should be seen in the same light as farmers, or nurses, or doctors, or police, or ambulance drivers - Canada's society and economy is so tightly integrated with USA that they can't just 'stop' delivery of goods. There would be massive food shortages, medicine shortages, you name it. If you want to replace truck drivers with air crews or sea crews to get a sense, it's similar.
The regulations apart from listing specific professions and things like that, also give the government broad discretion to let in anyone they think is necessary.
And yes, they are making a judgment that such essential functions are more important than personal trips, even ones that seem essential to the individuals.
Are there studies? I'm sure there are, I haven't looked them up.