Likely source of infection

Graphs and tables of covid 19 data by source of infection and outbreak setting.


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Where the numbers come from

Case information data sources

The Public Health Case and Contact Management Solution (CCM) is Ontario's primary disease reporting system. All of Ontario’s Public Health Units report covid 19 case and outbreak data to CCM each day.

All covid 19 case and outbreak data on this page is taken from CCM as of 1:00 p.m. the day before the “Last updated” date at the top of this page.

If there is a discrepancy between numbers reported here and those reported publicly by a Public Health Unit, it is likely because the Public Health Unit hasn’t yet updated their numbers in CCM. In that case, consider the number reported by the Public Health Unit to be the most up to date.

Outbreak setting reporting sources

We create the outbreak graphs and charts from information that facilities report to their local Public Health Unit (which enters it into a reporting tool).

“Outbreak” is defined differently depending on the facility and when the outbreak was reported. The number of outbreaks, and cases per outbreak, may change over time as Public Health Units gather information through their outbreak investigations.

If outbreak data reported here does not match data that other sources have reported to the data catalogue (for example long-term care outbreaks) it is because of different data-collection processes and definitions.