In what nation did high school seniors return to class this week, though dozens of schools closed two hours after they opened because of coronavirus concerns?

Quebec in eastern Canada

Explanation:

The number of cases of coronavirus is increasing day by day in Canada. Most of those deaths are in Quebec in eastern Canada. Despite the increase in numbers in Quebec, children were asked to return to classrooms while taking the following precautions.

1. Each class should have a maximum of 15 students.

2. Desks were to be kept at some distance.

Also, schools took several measures to ensure physical and social distancing.