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Local Stats: Cases & Outbreaks

COVID-19 Surveillance Reporting

*Cases are reported from data collected at 4:00pm yesterday.

This surveillance report contains local COVID-19 case data from March 26, 2020 to present. To align with the Ministry of Health’s reporting system, our daily summary is based on data collected up to 4:00pm the previous day. When we receive new information about an individual the database is updated. Subsequent reports include this new information.

Lab-confirmed COVID-19 cases updated 10:00am Monday to Friday only except statutory holidays.

COVID-19 Weekly Outbreak Summary Report updated by 12:00pm Tuesdays only

COVID-19 Weekly Vaccine Summary Report updated by 12:00pm Tuesdays only

Local School COVID-19 Outbreak Surveillance

Frequently Asked Questions

This report from Public Health Ontario has some information about provincial rates of confirmed cases of COVID-19 following vaccination. Only 0.02% of individuals who tested positive for COVID-19 were fully vaccinated. With how effective the vaccines are, it’s a reasonable assumption that the vast majority of new cases are in those people who are not fully vaccinated. Our numbers are too low to report if active cases were fully vaccinated; this might identify an individual and would be against our privacy policies. The Ministry of Health provides data about cases and vaccination status here.

Currently individuals ages 0-11 are not eligible for COVID-19 vaccine. To see cases by age group, select the “Case Demographics” tab on the dashboard.

Occasionally, data entry errors will result in a client being assigned to the wrong age grouping when their COVID-19 vaccine information is entered into the COVAX system. This results in some age groups where the client count is actually larger than the census count for that age group, giving a total percentage vaccinated that is larger than 100%.

When choosing to attend or host gatherings, be mindful of community spread of COVID-19 and the presence of the Delta variant in the community; also ask if people are traveling from an area where there are a lot of cases/outbreaks.

There are many reasons for retroactive changes in daily COVID-19 case counts. To be a confirmed case there must be a probable or lab confirmed case reported to us by the provincial and private health labs analyzing all of the testing that is being done at COVID-19 assessment centres across Ontario. Often times there is a delay between a person testing positive for COVID-19 and when the Health Unit receives the results for a positive test. This delay could be days or even a week or more. So, if a positive case from a week ago is received today, it will be counted as belonging to the day it was reported to Public Health. We have to retroactively update our case counts based on when we receive the lab results. For example: if we are reporting 5 cases today; a week later the count may be more or less than the 5 cases as new lab results are retroactively added to our case counts. This causes our Total, Active and Resolved cases counts to fluctuate day-to-day in ways that may not appear correct to you.

As well, follow-up lab analysis may determine that a previously positive COVID-19 case was in fact a false positive. In this event the case would then be retroactively removed from our daily case counts from the day it was originally reported.

Cases that are later determined to reside in another Health Unit, or Leeds, Grenville and Lanark District Health Unit cases reported to another Health Unit, will be transferred retrospectively as well.

Public Health Units continually clean up COVID-19 data, correcting for missing or duplicate cases and deaths. These corrections can result in data spikes, negative numbers and current totals being different from previously reported case and death counts.

If you are closely following our numbers daily, then doing simple subtractions to determine new case counts, active cases and resolved cases will likely not align.

COVID-19 case reporting is a dynamic process that changes by the minute and is not particular to any specific Health Unit but to every COVID-19 reporting agency in Canada at this time.

Our daily summary must be based on the data that is in the province’s disease reporting systems (Integrated Public Health Information System and Case and Contact Management System). The system takes a while to download the data and then it must be analyzed and a report generated from the data. Then it must be reviewed for any discrepancies and then sent to the communications team for posting.

Ontario’s health privacy legislation, the Personal Health Information Protection Act (PHIPA), establishes a set of rules regarding your personal health information (PHI). The rules in this Act protect “identifying information” about an individual, whether oral or recorded; if the information is related to the individual’s physical condition, for example testing positive for COVID-19. Being a rural area such as ours, that is less densely populated and where many people know their neighbours, we have to limit the geographic identification of individual people who have tested positive in order to comply with this regulation. To provide some data by place of residence, Lanark, Leeds and Grenville has been grouped into sub-regions to describe the distribution of the people who have tested positive for COVID-19 in our region overall.

Lanark East

  • Mississippi Mills
  • Almonte, Pakenham
  • Beckwith
  • Town of Carleton Place
  • Montague

Lanark West

  • Lanark Highlands
  • Tay Valley
  • Township of Drummond and North Elsmley
  • Town of Perth
  • Town of Smiths Falls

United Counties Leeds and Grenville East

  • North Grenville
  • Kemptville
  • Merrickville Wolford
  • Edwardsburgh/Cardinal
  • Spencerville
  • Augusta Township
  • Town of Prescott

United Counties Leeds and Grenville West

  • Rideau Lakes
  • Westport
  • Newboro
  • Township of Leeds and Thousand Islands
  • Town of Gananoque

United Counties Leeds and Grenville Central

  • City of Brockville
  • Township of Elizabethtown/Kitley
  • Township of Athens
  • Front of Yonge Township

The Ministry of Health receives the data once a day in the evening. This time lag is usually no more than one day, but means that Public Health Unit data is often the most up-to-date. While we both report on data from the same database/system, there is a difference in the timing of reporting that can cause different numbers. Also, as investigations evolve and data are cleaned, the numbers can also change. It’s important to be aware of these differences when comparing data between sources.

The Ministry of Long-Term Care posts data on the Ministry of Health website on each Long-Term Care outbreak. The information on whether someone had COVID-19 is personal health information and belongs to the individual and the home.

The government reports cases in schools on their website every weekday at 10:30am. Because the timing of their reporting is different than ours, there may be differences between what we report compared to what the government reports.

When it comes to COVID-19 cases, there are often rumours about positive cases so it’s important to think carefully when you hear a rumour. Other times, someone who tests positive for COVID-19 may work at a school, workplace, or healthcare facility in Leeds, Grenville and Lanark, but may not live in Leeds, Grenville and Lanark. If someone doesn’t live in Leeds, Grenville and Lanark, then their case is not included in our local numbers and reporting. We only share information about community outbreaks when there is a risk to the public.

Yes, the number of hospitalizations is the total of cases (living in Leeds, Grenville and Lanark) in hospital (any hospital) including those in the ICU, ICU is the total in ICU including those on a ventilator. So 1 in hospital 1 in ICU and 1 on ventilator is all 1 case, not 3.

Variants of Concern (VOC) are more easily spread with close contact, and cause more severe disease, including requiring hospitalization and death. All Variants of Concern are classified by lineage or mutation. There are many of each. For reporting, all lineages and mutations are classified as Variants of Concern as per Ontario Ministry of Health directives.

For clarification of any case information, please email us at [email protected].

Archived COVID-19 Surveillance Reports and Maps

Archived COVID-19 Surveillance Reports and Maps until December 22, 2020. Archived information for dates after that can be found by using the query section in tabs 2–6 in the surveillance report dashboard. Archived map information is not available.