| Algoma Public Health Unit | 46 | 306 | 19,946 |
| Brant County Health Unit | 71 | 52 | 19,364 |
| Chatham-Kent Health Unit | "Few instances" | | 17,415 |
| Durham Region Health Department | 68 | 89 | 59,698 |
| Grey Bruce Health Unit | 31 | | 22,062 |
| Haldimand-Norfolk Health Unit | 14 | | 17,608 |
| Haliburton, Kawartha, Pine Ridge District Health Unit | 63 | 64 | 19,891 |
| Hamilton Public Health Services | 125 | 1,207 | 63,482 |
| Kingston, Frontenac and Lennox & Addington Public Health | 115 (from March 11) | 345 (from March 11) | 51,398 |
| Lambton Public Health | 51 | 35 | 21,207 |
| Leeds, Grenville and Lanark District Health Unit | 16 | | 15,651 |
| Middlesex-London Health Unit | 97 | | 51,144 |
| Niagara Region Public Health Department | 50 | 1,158 | 48,263 |
| North Bay Parry Sound District Health Unit | 2 | | 17,086 |
| Ottawa Public Health | "Very minimal and uncommon" | Does not tally | 91,656 |
| Peterborough Public Health | 44 | 119 | 17,194 |
| Simcoe Muskoka District Health Unit | "Less than 10 doses" | | 56,241 |
| Southwestern Public Health | 25 | 0 | 11,325 |
| Sudbury & District Health Unit | 54 | 678 | 29,336 |
| Timiskaming Health Unit | 0 | 211 | 2,800 |
| Windsor-Essex County Health Unit | 247 | 908 | 65,828 |
| York Region Public Health Services | 1,220 | | 112,661 |
