| Dates | School | Confirmed Cases |
|---|
| Collected | Reported | School Board | School | Municipality | Student | Staff | Unspecified | Total |
|---|
| 2021-12-22 | 2021-12-23 | York Region District School Board | Boxwood Public School | Markham | 0 | 1 | 0 | 1 |
| 2021-12-21 | 2021-12-22 | York Region District School Board | Boxwood Public School | Markham | 0 | 1 | 0 | 1 |
| 2021-12-20 | 2021-12-21 | York Region District School Board | Boxwood Public School | Markham | 0 | 1 | 0 | 1 |
| 2021-12-17 | 2021-12-20 | York Region District School Board | Boxwood Public School | Markham | 0 | 1 | 0 | 1 |
| 2021-04-01 | 2021-04-06 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-31 | 2021-04-01 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-30 | 2021-03-31 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-29 | 2021-03-30 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-26 | 2021-03-29 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-25 | 2021-03-26 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-24 | 2021-03-25 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2021-03-23 | 2021-03-24 | York Region District School Board | Boxwood Public School | Markham | 1 | 0 | 0 | 1 |
| 2020-12-04 | 2020-12-07 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-12-03 | 2020-12-04 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-12-02 | 2020-12-03 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-12-01 | 2020-12-02 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-11-30 | 2020-12-01 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-11-27 | 2020-11-30 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-11-26 | 2020-11-27 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-11-25 | 2020-11-26 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 0 | 3 |
| 2020-11-24 | 2020-11-25 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 1 | 4 |
| 2020-11-23 | 2020-11-24 | York Region District School Board | Boxwood Public School | Markham | 2 | 1 | 1 | 4 |
| 2020-11-20 | 2020-11-23 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-19 | 2020-11-20 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-18 | 2020-11-19 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-17 | 2020-11-18 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-16 | 2020-11-17 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-13 | 2020-11-16 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-12 | 2020-11-13 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |
| 2020-11-11 | 2020-11-12 | York Region District School Board | Boxwood Public School | Markham | 0 | 0 | 1 | 1 |