| Dates | School | Confirmed Cases |
|---|
| Collected | Reported | School Board | School | Municipality | Student | Staff | Unspecified | Total |
|---|
| 2021-04-07 | 2021-04-08 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 0 | 0 | 1 |
| 2021-04-06 | 2021-04-07 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-04-01 | 2021-04-06 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-31 | 2021-04-01 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-30 | 2021-03-31 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-29 | 2021-03-30 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-26 | 2021-03-29 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-25 | 2021-03-26 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 1 | 1 | 0 | 2 |
| 2021-03-24 | 2021-03-25 | Catholic District School Board of Eastern Ontario | St Michael High School | North Grenville | 0 | 1 | 0 | 1 |