Щоб закінчити спор. ось конкретно написано Unvaccinated or partially vaccinated children 5 through 11 years old
Unvaccinated and partially vaccinated children under the age of 12 aren’t required to provide a valid pre-entry test result, if they’re accompanying a fully vaccinated adult.
They’re exempt from quarantine, without any limitations on their activities. This means, for example, they don't need to wait 14 days before attending school, camp or daycare. However they need to wear a mask in public settings (including school) for 14 days after arrival to Canada.
Arrival testing for unvaccinated or partially vaccinated children 5 through 11 years old:
must be tested if their accompanying parent is selected for mandatory randomized testing
