covid-19 in ontario: january 15, 2020 to january 1, 2020 · covid-19 in ontario: january 15, 2020...

COVID-19 in Ontario: January 15, 2020 to January 1, 2021 1

Daily Epidemiologic Summary

COVID-19 in Ontario: January 15, 2020 to January 1, 2021

This report includes the most current information available from CCM and other case management systems (CCM plus) as of January 1, 2021.

Please visit the interactive Ontario COVID-19 Data Tool to explore recent COVID-19 data by public health unit, age group, sex, and trends over time.

A weekly summary report is available with additional information to complement the daily report.

This daily report provides an epidemiologic summary of recent COVID-19 activity in Ontario. The change in cases is determined by taking the cumulative difference between the current day and the previous day.

Highlights There are a total of 187,998 confirmed cases of COVID-19 in Ontario reported to date.

Compared to the previous day*, this represents:

An increase of 3,363 confirmed cases (percent change of +35.8%)

An increase of 44 deaths (percent change of -13.7%)

An increase of 2,054 resolved cases (percent change of -16.5%)

* Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported. This issue also affects overall case counts for Ontario.

In this document, the term ‘change in cases’ refers to cases publicly reported by the province for a given day. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals for updated case counts (i.e., age group, gender) differing from the overall updated case counts.

The term public health unit reported date in this document refers to the date local public health units were first notified of the case.

https://www.publichealthontario.ca/en/data-and-analysis/infectious-disease/covid-19-data-surveillance/covid-19-data-tool


Case Characteristics

Table 1a. Summary of recent confirmed cases of COVID-19: Ontario

Change in cases

December 31, 2020

Change in cases

January 1, 2021

Percentage change

January 1, 2021 compared to

December 31, 2020

Cumulative case count

as of January 1, 2021

Total number of cases 2,476* 3,363 +35.8% 187,998

Number of deaths 51 44 -13.7% 4,625

Number resolved 2,460 2,054 -16.5% 160,526

Note: The number of cases publicly reported by the province each day may not align with case counts reported to public health on a given day; public health unit reported date refers to the date local public health was first notified of the case. Data corrections or updates can result in case records being removed and or updated from past reports.

Data Source: CCM plus

* Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported in this table. This issue also affects overall case counts for Ontario.


Table 1b. Summary of recent confirmed cases of COVID-19 by age group and gender: Ontario

Change in cases

December 31, 2020

Change in cases

January 1, 2021


as of January 1, 2021

Gender: Male 1,211 1,622 92,028

Gender: Female 1,243 1,758 94,819

Ages: 19 and under 326 440 24,328

Ages: 20-39 865 1,258 68,379

Ages: 40-59 757 970 54,218

Ages: 60-79 378 499 27,197

Ages: 80 and over 142 196 13,831

Note: Not all cases have a reported age or gender reported. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals (i.e., age group, gender) differing from past publicly reported case counts.


Table 2. Summary of recent confirmed cases of COVID-19 in school aged children by age group, August 30, 2020 to January 1, 2021: Ontario

Change in cases

December 31, 2020

Change in cases

January 1, 2021

Cumulative case count from August 30, 2020

to January 1, 2021

Ages: 4 to 8 56 63 3,894

Ages: 9 to 13 78 113 5,507

Ages: 14 to 17 103 122 5,437

Note: Includes all confirmed cases of COVID-19 for specified ages, regardless of school attendance. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals (i.e., age group) differing from past publicly reported case counts.



Table 3. Summary of recent confirmed cases of COVID-19 in long-term care homes: Ontario

Long-term care home cases Change in cases

December 31, 2020

Change in cases

January 1, 2021

Cumulative case count as of January 1, 2021

Residents 116 74 11,217

Health care workers 49 36 4,365

Deaths among residents 23 14 2,814

Deaths among health care workers

0 0 8

Note: Information on how long-term care home residents and health care workers are identified is available in the technical notes. Also, the change in cases in these categories may represent existing case records that have been updated.



Time

Figure 1. Confirmed cases of COVID-19 by likely acquisition and public health unit reported date: Ontario, January 15, 2020 to January 1, 2021



Figure 2. Confirmed cases of COVID-19 by likely acquisition and approximation of symptom onset date: Ontario, January 15, 2020 to January 1, 2021

Note: Not all cases may have an episode date and those without one are not included in the figure. Episode date is defined and available in the technical notes.



Figure 3. Number of COVID-19 tests completed and percent positivity: Ontario, March 29, 2020 to December 30*, 2020

Note: The number of tests performed does not reflect the number of specimens or persons tested. More than one test may be performed per specimen or per person. As such, the percentage of tests that were positive does not necessarily translate to the number of specimens or persons testing positive.

Data Source: The Provincial COVID-19 Diagnostics Network, data reported by member microbiology laboratories.

* The daily number of tests completed and percent positivity are not available for December 31, 2020.


Severity Figure 4. Confirmed deaths among COVID-19 cases by date of death: Ontario, March 1, 2020 to January 1, 2021

Note: Cases without a death date are not included in the figure.



Table 4. Confirmed cases of COVID-19 by severity: Ontario

Blank cell Cumulative case count as of January 1, 2021

Percentage of all cases

Cumulative deaths reported (please note there may be a reporting delay for deaths)

4,625 2.5%

Deaths reported in ages: 19 and under 1 < 0.1%

Deaths reported in ages: 20-39 18 < 0.1%

Deaths reported in ages: 40-59 177 0.3%

Deaths reported in ages: 60-79 1,228 4.5%

Deaths reported in ages: 80 and over 3,200 23.1%

Ever in ICU 1,956 1.0%

Ever hospitalized 9,921 5.3%

Note: Not all cases have an age reported. Data corrections or updates can result in case records being removed and/or updated and may result in totals differing from past publicly reported case counts.



Geography

Table 5. Summary of recent confirmed cases of COVID-19 by public health unit and region: Ontario

Public Health Unit Name

Change in cases

December 31, 2020

Change in cases

January 1, 2021


Cumulative rate per 100,000 population

Northwestern Health Unit 4 5 172 196.2

Thunder Bay District Health Unit 4 4 588 392.1

TOTAL NORTH WEST 8 9 760 319.8

Algoma Public Health 1 9 75 65.5

North Bay Parry Sound District Health Unit

4 2 132 101.7

Porcupine Health Unit 2 -1 130 155.8

Public Health Sudbury & Districts 3 3 280 140.7

Timiskaming Health Unit 2 1 73 223.3

TOTAL NORTH EAST 12 14 690 123.4

Ottawa Public Health 93 81 10,241 971.0

Eastern Ontario Health Unit 25 53 1,472 705.3

Hastings Prince Edward Public Health

2 14 293 173.9

Kingston, Frontenac and Lennox & Addington Public Health

5 8 547 257.1

Leeds, Grenville & Lanark District Health Unit

5 12 694 400.8

Renfrew County and District Health Unit

1 -1 238 219.1



Change in cases

December 31, 2020

Change in cases

January 1, 2021



TOTAL EASTERN 131 167 13,485 700.0

Durham Region Health Department 149 115 7,519 1,055.4

Haliburton, Kawartha, Pine Ridge District Health Unit

8 20 544 287.9

Peel Public Health 480 713 40,497 2,521.7

Peterborough Public Health 13 20 364 246.0

Simcoe Muskoka District Health Unit

53 58 3,699 616.9

York Region Public Health 300 395 18,029 1,470.8

TOTAL CENTRAL EAST 1,003 1,321 70,652 1,576.8

Toronto Public Health 499* 700 59,873 1,918.8

TOTAL TORONTO 499* 700 59,873 1,918.8

Chatham-Kent Public Health 21 9 715 672.5

Grey Bruce Health Unit 7 11 465 273.7

Huron Perth Public Health 8 22 711 508.7

Lambton Public Health 37 70 856 653.6

Middlesex-London Health Unit 52 94 3,370 664.0

Southwestern Public Health 71 56 1,435 678.5

Windsor-Essex County Health Unit 175 226 7,953 1,872.0

TOTAL SOUTH WEST 371 488 15,505 917.0

Brant County Health Unit 22 26 1,026 661.1



Change in cases

December 31, 2020

Change in cases

January 1, 2021



City of Hamilton Public Health Services

111 171 6,300 1,063.9

Haldimand-Norfolk Health Unit 29 36 939 823.1

Halton Region Public Health 78 152 5,880 949.8

Niagara Region Public Health 101 166 4,204 889.8

Region of Waterloo Public Health and Emergency Services

51 58 5,976 1,022.7

Wellington-Dufferin-Guelph Public Health

60 55 2,708 868.2

TOTAL CENTRAL WEST 452 664 27,033 948.8

TOTAL ONTARIO 2,476 3,363 187,998 1,264.8

Notes: Health units with data corrections or updates could result in records being removed from totals resulting in negative counts.


* Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported in this table. This issue also affects overall case counts for Ontario.


Outbreaks

Table 6. Summary of recent confirmed COVID-19 outbreaks reported in long-term care homes, retirement homes and hospitals by status: Ontario

Institution type

Change in outbreaks

December 31, 2020

Change in outbreaks January 1,

2021

Number of ongoing

outbreaks

Cumulative number of outbreaks reported

Long-term care homes 10 15 216 938

Retirement homes 10 3 120 493

Hospitals 1 4 55 246

Note: Ongoing outbreaks include all outbreaks that are ‘Open’ in CCM plus without a ‘Declared Over Date’ recorded, or where the outbreak started more than five months ago, even for outbreaks where the Outbreak Status value selected in CCM/iPHIS is 'OPEN'. The start of the outbreak is determined by the onset date of first case, or if missing the outbreak reported date, or else if that is also missing, then the outbreak created date.



Technical Notes

Data Sources The data for this report were based on:

Information extracted from the Ontario Ministry of Health (Ministry) integrated Public Health Information System (iPHIS) database for Toronto Public Health as of January 1, 2021 at 1 p.m.

Information successfully uploaded to the Ministry from Local Systems: Toronto Public Health (Coronavirus Rapid Entry System) CORES as of January 1, 2021 at 2 p.m.

Information successfully extracted from the Public Health Case and Contact Management Solution (CCM) for all other PHUs by PHO as of January 1, 2021 at 1 p.m.

CCM and CCM plus (which includes CCM, iPHIS, and CORES) are dynamic disease reporting systems, which allow ongoing updates to data previously entered. As a result, data extracted from CCM and the Local Systems represent a snapshot at the time of extraction and may differ from previous or subsequent reports.

Ontario population projection data for 2020 were sourced from Ministry, IntelliHEALTH Ontario. Data were extracted on November 26, 2019.

COVID-19 test data were based on information from The Provincial COVID-19 Diagnostics Network, reported by member microbiology laboratories.

Data Caveats The data only represent cases reported to public health units and recorded in CCM plus. As a

result, all counts will be subject to varying degrees of underreporting due to a variety of factors, such as disease awareness and medical care seeking behaviours, which may depend on severity of illness, clinical practice, changes in laboratory testing, and reporting behaviours.

Lags in CCM plus data entry due to weekend staffing may result in lower case counts than would otherwise be recorded.

Only cases meeting the confirmed case classification as listed in the MOH COVID-19 case definition are included in the report counts from CCM plus. This includes persons with a positive detection of serum/plasma immunoglobulin G (IgG) antibodies to SARS-CoV-2, which was added to the confirmed case definition on August 6, 2020.

The number of tests performed does not reflect the number of specimens or persons tested. More than one test may be performed per specimen or per person. As such, the percentage of tests that were positive does not necessarily translate to the number of specimens or persons testing positive.

Reported date is the date the case was reported to the public health unit.

http://www.health.gov.on.ca/en/pro/programs/publichealth/coronavirus/2019_guidance.aspxhttp://www.health.gov.on.ca/en/pro/programs/publichealth/coronavirus/2019_guidance.aspx


Case episode date is based on an estimate of the best date of disease onset. This date is calculated based on either the date of symptom onset, specimen collection/test date, or the date reported to the public health unit.

Resolved cases are determined only for COVID-19 cases that have not died. Cases that have died are considered fatal and not resolved. The following cases are classified as resolved:

Cases that are reported as ‘recovered’ in CCM

Cases that are not hospitalized and are 14 days past their episode date

Cases that are currently hospitalized (no hospital end date entered) and have a status of ‘closed’ in CCM (indicating public health unit follow-up is complete) and are 14 days past their symptom onset date or specimen collection date

Hospitalization includes all cases for which a hospital admission date was reported at the time of data extraction. It includes cases that have been discharged from hospital as well as cases that are currently hospitalized. Emergency room visits are not included in the number of reported hospitalizations.

ICU admission includes all cases for which an ICU admission date was reported at the time of data extraction. It is a subset of the count of hospitalized cases. It includes cases that have been treated or that are currently being treated in an ICU.

Orientation of case counts by geography is based on the diagnosing health unit (DHU). DHU refers to the case's public health unit of residence at the time of illness onset and not necessarily the location of exposure. Cases for which the DHU was reported as MOH (to signify a case that is not a resident of Ontario) have been excluded from the analyses.

Likely source of acquisition is determined by examining the epidemiologic link and epidemiologic link status fields in CCM and local systems. If no epidemiologic link is identified in those fields the risk factor fields are examined to determine whether a case travelled, was associated with a confirmed outbreak, was a contact of a case, had no known epidemiological link (sporadic community transmission) or was reported to have an unknown source/no information was reported. Some cases may have no information reported if the case is untraceable, was lost to follow-up or referred to FNIHB. Cases with multiple risk factors were assigned to a single likely acquisition source group which was determined hierarchically in the following order:

For cases with an episode date on or after April 1, 2020: Outbreak-associated > close contact of a confirmed case > travel > no known epidemiological link > information missing or unknown

For cases with an episode date before April 1, 2020: Travel > outbreak-associated > close contact of a confirmed case > no known epidemiological link > information missing or unknown

Deaths are determined by using the outcome field in CCM plus. Any case marked ‘Fatal’ is included in the deaths data. The CCM field Type of Death is not used to further categorize the data.


The date of death is determined using the outcome date field for cases marked as ‘Fatal’ in the outcome field.

COVID-19 cases from CCM plus for which the Classification and/or Disposition was reported as ENTERED IN ERROR, DOES NOT MEET DEFINITION, IGNORE, DUPLICATE, or any variation on these values have been excluded. The provincial case count for COVID-19 includes cases that are counted once across all systems from which the case data are obtained. Duplicate records may exist if these records were not identified and resolved prior to data upload to the Ministry.

Ongoing outbreaks include all outbreaks that are ‘Open’ in CCM plus without a ‘Declared Over Date’ recorded, or where the outbreak started more than five months ago, even for outbreaks where the Outbreak Status value selected in CCM/iPHIS is 'OPEN'. The start of the outbreak is determined by the onset date of first case, or if missing the outbreak reported date, or else if that is also missing, then the outbreak created date.

‘Long-term care home residents’ includes cases that reported ‘Yes’ to the risk factor ‘Resident of a long-term care home’; or ‘Yes’ to the risk factor ‘Resident of nursing home or other chronic care facility’ and reported to be part of an outbreak assigned as a long-term care home (via the Outbreak number or case comments field); or were reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field) with an age over 70 years and did not report ‘No’ to the risk factors ‘Resident of long-term care home’ or ‘Resident of nursing home or other chronic care facility’. ‘Long-term care home residents’ excludes cases that reported ‘Yes’ to any of the health care worker occupational risk factors.

The ‘health care workers’ variable includes cases that reported ‘Yes’ to any of the occupation of health care worker, doctor, nurse, dentist, dental hygienist, midwife, other medical technicians, personal support worker, respiratory therapist, first responder.

‘Health care workers associated with long-term care outbreaks’ includes ‘health care workers’ reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field). Excludes cases that reported ‘Yes’ to risk factors ‘Resident of long-term care home’ or ‘Resident of nursing home or other chronic care facility’ and ‘Yes’ to the calculated ‘health care workers’ variable.

Percent change is calculated by taking the difference between the current period (i.e., daily count or sum of the daily count over a 7-day period) and previous period (i.e., daily count or sum of the daily count over a 7-day period), divided by the previous period.


Appendix A Table A1. Weekly rates of confirmed COVID-19 cases per 100,000 population over recent rolling 7-day periods, by reported date and public health unit: Ontario, December 17, 2020 to December 29, 2020


Dec 17 to

Dec 23

Dec 18 to

Dec 24

Dec 19 to

Dec 25

Dec 20 to

Dec 26

Dec 21 to

Dec 27

Dec 22 to

Dec 28

Dec 23 to

Dec 29

% change from

Dec 17-23 to Dec 23-

29

NORTH WEST

Northwestern Health Unit

11.4 19.4 19.4 22.8 24.0 19.4 19.4 +70.2%

Thunder Bay District Health Unit

59.3 52.0 48.0 40.0 41.3 38.0 26.0 -56.2%

NORTH EAST

Algoma Public Health

1.7 1.7 1.7 2.6 2.6 2.6 1.7 0.0%

North Bay Parry Sound District Health Unit

10.8 12.3 10.0 10.0 8.5 9.2 9.2 -14.8%

Porcupine Health Unit

10.8 9.6 9.6 7.2 8.4 3.6 1.2 -88.9%

Public Health Sudbury & Districts

6.0 5.5 6.5 6.5 6.0 7.0 8.0 +33.3%

Timiskaming Health Unit

61.2 70.4 79.5 76.5 76.5 67.3 70.4 +15.0%

EASTERN

Ottawa Public Health

29.8 31.6 37.1 34.5 38.3 40.0 46.5 +56.0%



Dec 17 to

Dec 23

Dec 18 to

Dec 24

Dec 19 to

Dec 25

Dec 20 to

Dec 26

Dec 21 to

Dec 27

Dec 22 to

Dec 28

Dec 23 to

Dec 29

% change from


29

Eastern Ontario Health Unit

50.3 54.1 51.7 49.4 54.1 58.0 66.6 +32.4%

Hastings Prince Edward Public Health

16.6 14.8 11.3 9.5 9.5 8.9 10.7 -35.5%

Kingston, Frontenac and Lennox & Addington Public Health

27.3 27.3 22.1 24.4 21.2 22.6 19.3 -29.3%

Leeds, Grenville & Lanark District Health Unit

13.9 12.1 9.8 9.8 11.5 13.9 19.6 +41.0%

Renfrew County and District Health Unit

12.9 10.1 12.0 9.2 10.1 10.1 11.0 -14.7%

CENTRAL EAST

Durham Region Health Department

96.6 92.2 89.4 87.9 84.1 84.9 87.9 -9.0%

Haliburton, Kawartha, Pine Ridge District Health Unit

25.9 26.5 25.4 22.8 21.2 20.6 21.7 -16.2%

Peel Public Health

194.7 190.8 182.6 177.0 173.9 173.9 178.0 -8.6%



Dec 17 to

Dec 23

Dec 18 to

Dec 24

Dec 19 to

Dec 25

Dec 20 to

Dec 26

Dec 21 to

Dec 27

Dec 22 to

Dec 28

Dec 23 to

Dec 29

% change from


29

Peterborough Public Health

18.9 21.6 31.8 30.4 33.8 31.1 30.4 +60.8%

Simcoe Muskoka District Health Unit

59.5 57.9 58.4 57.4 56.9 61.0 59.9 +0.7%

York Region Public Health

129.9 130.9 129.7 121.8 114.5 125.8 136.9 +5.4%

TORONTO

Toronto Public Health

145.2 141.1 141.5 146.2 142.1 147.4 153.0 +5.4%

SOUTH WEST

Chatham-Kent Public Health

37.6 35.7 45.1 46.1 52.7 64.0 75.2 +100.0%

Grey Bruce Health Unit

22.4 20.6 21.2 20.6 19.4 17.7 15.9 -29.0%

Huron Perth Public Health

52.2 63.0 65.1 76.6 74.4 73.7 78.0 +49.4%

Lambton Public Health

77.1 77.1 81.7 104.6 115.3 125.2 123.7 +60.4%

Middlesex-London Health Unit

99.5 93.4 88.5 91.6 92.2 95.2 103.0 +3.5%

Southwestern Public Health

97.9 97.9 105.4 102.1 109.2 102.6 112.1 +14.5%

Windsor-Essex County Health Unit

277.1 258.2 271.4 272.1 270.5 270.5 262.7 -5.2%



Dec 17 to

Dec 23

Dec 18 to

Dec 24

Dec 19 to

Dec 25

Dec 20 to

Dec 26

Dec 21 to

Dec 27

Dec 22 to

Dec 28

Dec 23 to

Dec 29

% change from


29

CENTRAL WEST

Brant County Health Unit

63.1 51.5 50.3 50.3 51.5 61.2 61.2 -3.0%

City of Hamilton Public Health Services

123.1 108.4 109.1 106.7 115.2 123.1 128.2 +4.1%

Haldimand-Norfolk Health Unit

71.0 76.3 72.8 57.0 60.5 53.5 60.5 -14.8%

Halton Region Public Health

83.5 87.9 83.7 86.4 86.4 94.7 93.4 +11.9%

Niagara Region Public Health

125.1 131.9 114.3 109.8 117.9 121.9 127.8 +2.2%

Region of Waterloo Public Health and Emergency Services

110.7 109.2 104.4 97.0 91.4 88.0 93.8 -15.3%

Wellington-Dufferin-Guelph Public Health

103.6 105.5 93.6 95.2 98.4 102.9 102 -1.5%

TOTAL ONTARIO

109.0 106.7 105.2 104.4 103.4 106.7 110.7 +1.6%

Note: Rates are based on the sum of the daily case counts during the date ranges specified in each column.



Disclaimer This document was developed by Public Health Ontario (PHO). PHO provides scientific and technical advice to Ontario’s government, public health organizations and health care providers. PHO’s work is guided by the current best available evidence at the time of publication.

The application and use of this document is the responsibility of the user. PHO assumes no liability resulting from any such application or use.

This document may be reproduced without permission for non-commercial purposes only and provided that appropriate credit is given to PHO. No changes and/or modifications may be made to this document without express written permission from PHO.

Citation Ontario Agency for Health Protection and Promotion (Public Health Ontario). Epidemiologic summary: COVID-19 in Ontario – January 15, 2020 to January 1, 2021. Toronto, ON: Queen’s Printer for Ontario; 2021.

For Further Information For more information, email [email protected].

Public Health Ontario Public Health Ontario is an agency of the Government of Ontario dedicated to protecting and promoting the health of all Ontarians and reducing inequities in health. Public Health Ontario links public health practitioners, front-line health workers and researchers to the best scientific intelligence and knowledge from around the world.

For more information about PHO, visit publichealthontario.ca.

mailto:[email protected]://www.publichealthontario.ca/

Structure Bookmarks ArtifactArtifactArtifactDaily Epidemiologic Summary COVID-19 in Ontario: January 15, 2020 to January 1, 2021 This report includes the most current information available from CCM and other case management systems (CCM plus) as of January 1, 2021. PSpanPlease visit the interactive Ontario COVID-19 Data ToolOntario COVID-19 Data Tool

to explore recent COVID-19 data by public health unit, age group, sex, and trends over time.

A weekly summary report is available with additional information to complement the daily report. This daily report provides an epidemiologic summary of recent COVID-19 activity in Ontario. The change in cases is determined by taking the cumulative difference between the current day and the previous day. Highlights There are a total of 187,998 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 187,998 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 187,998 confirmed cases of COVID-19 in Ontario reported to date.

Compared to the previous day*, this represents: Compared to the previous day*, this represents:

An increase of 3,363 confirmed cases (percent change of +35.8%) An increase of 3,363 confirmed cases (percent change of +35.8%)

An increase of 44 deaths (percent change of -13.7%) An increase of 44 deaths (percent change of -13.7%)

An increase of 2,054 resolved cases (percent change of -16.5%) An increase of 2,054 resolved cases (percent change of -16.5%)

* Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported. This issue also affects overall case counts for Ontario. In this document, the term ‘change in cases’ refers to cases publicly reported by the province for a given day. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals for updated case counts (i.e., age group, gender) differing from the overall updated case counts. In this document, the term ‘change in cases’ refers to cases publicly reported by the province for a given day. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals for updated case counts (i.e., age group, gender) differing from the overall updated case counts. The term public health unit reported date in this document refers to the date local public health units were first notified of the case.

Case Characteristics Table 1a. Summary of recent confirmed cases of COVID-19: Ontario TableTRTHSpan

THSpanChange in cases December 31, 2020

THSpanChange in cases January 1, 2021

THSpanPercentage change January 1, 2021 compared to December 31, 2020

THSpanCumulative case count as of January 1, 2021

Span

TRTDSpanTotal number of cases

TDSpan2,476*

TDSpan3,363

TDSpan+35.8%

TDSpan187,998

TRTDSpanNumber of deaths

TDSpan51

TDSpan44

TDSpan-13.7%

TDSpan4,625

TRTDSpanNumber resolved

TDSpan2,460

TDSpan2,054

TDSpan-16.5%

TDSpan160,526

Span

Note: The number of cases publicly reported by the province each day may not align with case counts reported to public health on a given day; public health unit reported date refers to the date local public health was first notified of the case. Data corrections or updates can result in case records being removed and or updated from past reports. Data Source: CCM plus * Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported in this table. This issue also affects overall case counts for Ontario. Table 1b. Summary of recent confirmed cases of COVID-19 by age group and gender: Ontario TableTRTHSpan




Span

TRTDSpanGender: Male

TDSpan1,211

TDSpan1,622

TDSpan92,028

TRTDSpanGender: Female

TDSpan1,243

TDSpan1,758

TDSpan94,819

TRTDSpanAges: 19 and under

TDSpan326

TDSpan440

TDSpan24,328

TRTDSpanAges: 20-39

TDSpan865

TDSpan1,258

TDSpan68,379

TRTDSpanAges: 40-59

TDSpan757

TDSpan970

TDSpan54,218

TRTDSpanAges: 60-79

TDSpan378

TDSpan499

TDSpan27,197

TRTDSpanAges: 80 and over

TDSpan142

TDSpan196

TDSpan13,831

Span

Note: Not all cases have a reported age or gender reported. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals (i.e., age group, gender) differing from past publicly reported case counts. Data Source: CCM plus Table 2. Summary of recent confirmed cases of COVID-19 in school aged children by age group, August 30, 2020 to January 1, 2021: Ontario TableTRTHSpan



THSpanCumulative case count from August 30, 2020 to January 1, 2021

Span

TRTDSpanAges: 4 to 8

TDSpan56

TDSpan63

TDSpan3,894


TDSpan78

TDSpan113

TDSpan5,507


TDSpan103

TDSpan122

TDSpan5,437

Span

Note: Includes all confirmed cases of COVID-19 for specified ages, regardless of school attendance. Data corrections or updates can result in case records being removed and or updated from past reports and may result in subset totals (i.e., age group) differing from past publicly reported case counts. Data Source: CCM plus Table 3. Summary of recent confirmed cases of COVID-19 in long-term care homes: Ontario TableTRTHSpanLong-term care home cases




Span

TRTDSpanResidents

TDSpan116

TDSpan74

TDSpan11,217

TRTDSpanHealth care workers

TDSpan49

TDSpan36

TDSpan4,365

TRTDSpanDeaths among residents

TDSpan23

TDSpan14

TDSpan2,814

TRTDSpanDeaths among health care workers

TDSpan0

TDSpan0

TDSpan8

Span

Note: Information on how long-term care home residents and health care workers are identified is available in the technical notes. Also, the change in cases in these categories may represent existing case records that have been updated. Data Source: CCM plus Time Figure 1. Confirmed cases of COVID-19 by likely acquisition and public health unit reported date: Ontario, January 15, 2020 to January 1, 2021 FigureData Source: CCM plus Figure 2. Confirmed cases of COVID-19 by likely acquisition and approximation of symptom onset date: Ontario, January 15, 2020 to January 1, 2021 Figure Note: Not all cases may have an episode date and those without one are not included in the figure. Episode date is defined and available in the technical notes. Data Source: CCM plus Figure 3. Number of COVID-19 tests completed and percent positivity: Ontario, March 29, 2020 to December 30*, 2020 FigureNote: The number of tests performed does not reflect the number of specimens or persons tested. More than one test may be performed per specimen or per person. As such, the percentage of tests that were positive does not necessarily translate to the number of specimens or persons testing positive. Data Source: The Provincial COVID-19 Diagnostics Network, data reported by member microbiology laboratories. * The daily number of tests completed and percent positivity are not available for December 31, 2020. Severity Figure 4. Confirmed deaths among COVID-19 cases by date of death: Ontario, March 1, 2020 to January 1, 2021 FigureNote: Cases without a death date are not included in the figure. Data Source: CCM plusTable 4. Confirmed cases of COVID-19 by severity: Ontario TableTRTHSpanBlank cell


THSpanPercentage of all cases

Span

TRTDSpanCumulative deaths reported (please note there may be a reporting delay for deaths)

TDSpan4,625

TDSpan2.5%

TRTDSpanDeaths reported in ages: 19 and under

TDSpan1

TDSpan< 0.1%

TRTDSpanDeaths reported in ages: 20-39

TDSpan18

TDSpan< 0.1%


TDSpan177

TDSpan0.3%


TDSpan1,228

TDSpan4.5%

TRTDSpanDeaths reported in ages: 80 and over

TDSpan3,200

TDSpan23.1%

TRTDSpanEver in ICU

TDSpan1,956

TDSpan1.0%

TRTDSpanEver hospitalized

TDSpan9,921

TDSpan5.3%

Span

Note: Not all cases have an age reported. Data corrections or updates can result in case records being removed and/or updated and may result in totals differing from past publicly reported case counts. Data Source: CCM plus Geography Table 5. Summary of recent confirmed cases of COVID-19 by public health unit and region: Ontario TableTRTHSpanPublic Health Unit Name



THSpanCumulative case count

THSpanCumulative rate per 100,000 population

Span

TRTDSpanNorthwestern Health Unit

TDSpan4

TDSpan5

TDSpan172

TDSpan196.2

TRTDSpanThunder Bay District Health Unit

TDSpan4

TDSpan4

TDSpan588

TDSpan392.1

TRTDSpanTOTAL NORTH WEST

TDSpan8

TDSpan9

TDSpan760

TDSpan319.8

TRTDSpanAlgoma Public Health

TDSpan1

TDSpan9

TDSpan75

TDSpan65.5

TRTDSpanNorth Bay Parry Sound District Health Unit

TDSpan4

TDSpan2

TDSpan132

TDSpan101.7

TRTDSpanPorcupine Health Unit

TDSpan2

TDSpan-1

TDSpan130

TDSpan155.8

TRTDSpanPublic Health Sudbury & Districts

TDSpan3

TDSpan3

TDSpan280

TDSpan140.7

TRTDSpanTimiskaming Health Unit

TDSpan2

TDSpan1

TDSpan73

TDSpan223.3

TRTDSpanTOTAL NORTH EAST

TDSpan12

TDSpan14

TDSpan690

TDSpan123.4

TRTDSpanOttawa Public Health

TDSpan93

TDSpan81

TDSpan10,241

TDSpan971.0

TRTDSpanEastern Ontario Health Unit

TDSpan25

TDSpan53

TDSpan1,472

TDSpan705.3

TRTDSpanHastings Prince Edward Public Health

TDSpan2

TDSpan14

TDSpan293

TDSpan173.9

TRTDSpanKingston, Frontenac and Lennox & Addington Public Health

TDSpan5

TDSpan8

TDSpan547

TDSpan257.1

TRTDSpanLeeds, Grenville & Lanark District Health Unit

TDSpan5

TDSpan12

TDSpan694

TDSpan400.8

TRTDSpanRenfrew County and District Health Unit

TDSpan1

TDSpan-1

TDSpan238

TDSpan219.1

Span

TableTRTHSpanPublic Health Unit Name





Span

TRTDSpanTOTAL EASTERN

TDSpan131

TDSpan167

TDSpan13,485

TDSpan700.0

TRTDSpanDurham Region Health Department

TDSpan149

TDSpan115

TDSpan7,519

TDSpan1,055.4

TRTDSpanHaliburton, Kawartha, Pine Ridge District Health Unit

TDSpan8

TDSpan20

TDSpan544

TDSpan287.9

TRTDSpanPeel Public Health

TDSpan480

TDSpan713

TDSpan40,497

TDSpan2,521.7

TRTDSpanPeterborough Public Health

TDSpan13

TDSpan20

TDSpan364

TDSpan246.0

TRTDSpanSimcoe Muskoka District Health Unit

TDSpan53

TDSpan58

TDSpan3,699

TDSpan616.9

TRTDSpanYork Region Public Health

TDSpan300

TDSpan395

TDSpan18,029

TDSpan1,470.8

TRTDSpanTOTAL CENTRAL EAST

TDSpan1,003

TDSpan1,321

TDSpan70,652

TDSpan1,576.8

TRTDSpanToronto Public Health

TDSpan499*

TDSpan700

TDSpan59,873

TDSpan1,918.8

TRTDSpanTOTAL TORONTO

TDSpan499*

TDSpan700

TDSpan59,873

TDSpan1,918.8

TRTDSpanChatham-Kent Public Health

TDSpan21

TDSpan9

TDSpan715

TDSpan672.5

TRTDSpanGrey Bruce Health Unit

TDSpan7

TDSpan11

TDSpan465

TDSpan273.7

TRTDSpanHuron Perth Public Health

TDSpan8

TDSpan22

TDSpan711

TDSpan508.7

TRTDSpanLambton Public Health

TDSpan37

TDSpan70

TDSpan856

TDSpan653.6

TRTDSpanMiddlesex-London Health Unit

TDSpan52

TDSpan94

TDSpan3,370

TDSpan664.0

TRTDSpanSouthwestern Public Health

TDSpan71

TDSpan56

TDSpan1,435

TDSpan678.5

TRTDSpanWindsor-Essex County Health Unit

TDSpan175

TDSpan226

TDSpan7,953

TDSpan1,872.0

TRTDSpanTOTAL SOUTH WEST

TDSpan371

TDSpan488

TDSpan15,505

TDSpan917.0

TRTDSpanBrant County Health Unit

TDSpan22

TDSpan26

TDSpan1,026

TDSpan661.1

Span






Span

TRTDSpanCity of Hamilton Public Health Services

TDSpan111

TDSpan171

TDSpan6,300

TDSpan1,063.9

TRTDSpanHaldimand-Norfolk Health Unit

TDSpan29

TDSpan36

TDSpan939

TDSpan823.1

TRTDSpanHalton Region Public Health

TDSpan78

TDSpan152

TDSpan5,880

TDSpan949.8

TRTDSpanNiagara Region Public Health

TDSpan101

TDSpan166

TDSpan4,204

TDSpan889.8

TRTDSpanRegion of Waterloo Public Health and Emergency Services

TDSpan51

TDSpan58

TDSpan5,976

TDSpan1,022.7

TRTDSpanWellington-Dufferin-Guelph Public Health

TDSpan60

TDSpan55

TDSpan2,708

TDSpan868.2

TRTDSpanTOTAL CENTRAL WEST

TDSpan452

TDSpan664

TDSpan27,033

TDSpan948.8

TRTDSpanTOTAL ONTARIO

TDSpan2,476

TDSpan3,363

TDSpan187,998

TDSpan1,264.8

Span

Notes: Health units with data corrections or updates could result in records being removed from totals resulting in negative counts. Data Source: CCM plus * Due to a data issue, cases reported on December 31, 2020 for Toronto Public Health are under-reported in this table. This issue also affects overall case counts for Ontario. Outbreaks Table 6. Summary of recent confirmed COVID-19 outbreaks reported in long-term care homes, retirement homes and hospitals by status: Ontario TableTRTHSpanInstitution type

THSpanChange in outbreaks December 31, 2020

THSpanChange in outbreaks January 1, 2021

THSpanNumber of ongoing outbreaks

THSpanCumulative number of outbreaks reported

Span

TRTDSpanLong-term care homes

TDSpan10

TDSpan15

TDSpan216

TDSpan938

TRTDSpanRetirement homes

TDSpan10

TDSpan3

TDSpan120

TDSpan493

TRTDSpanHospitals

TDSpan1

TDSpan4

TDSpan55

TDSpan246

Span

Note: Ongoing outbreaks include all outbreaks that are ‘Open’ in CCM plus without a ‘Declared Over Date’ recorded, or where the outbreak started more than five months ago, even for outbreaks where the Outbreak Status value selected in CCM/iPHIS is 'OPEN'. The start of the outbreak is determined by the onset date of first case, or if missing the outbreak reported date, or else if that is also missing, then the outbreak created date. Data Source: CCM plus Technical Notes Data Sources The data for this report were based on: The data for this report were based on: The data for this report were based on:

Information extracted from the Ontario Ministry of Health (Ministry) integrated Public Health Information System (iPHIS) database for Toronto Public Health as of January 1, 2021 at 1 p.m. Information extracted from the Ontario Ministry of Health (Ministry) integrated Public Health Information System (iPHIS) database for Toronto Public Health as of January 1, 2021 at 1 p.m.

Information successfully uploaded to the Ministry from Local Systems: Toronto Public Health (Coronavirus Rapid Entry System) CORES as of January 1, 2021 at 2 p.m. Information successfully uploaded to the Ministry from Local Systems: Toronto Public Health (Coronavirus Rapid Entry System) CORES as of January 1, 2021 at 2 p.m.

Information successfully extracted from the Public Health Case and Contact Management Solution (CCM) for all other PHUs by PHO as of January 1, 2021 at 1 p.m. Information successfully extracted from the Public Health Case and Contact Management Solution (CCM) for all other PHUs by PHO as of January 1, 2021 at 1 p.m.

CCM and CCM plus (which includes CCM, iPHIS, and CORES) are dynamic disease reporting systems, which allow ongoing updates to data previously entered. As a result, data extracted from CCM and the Local Systems represent a snapshot at the time of extraction and may differ from previous or subsequent reports. CCM and CCM plus (which includes CCM, iPHIS, and CORES) are dynamic disease reporting systems, which allow ongoing updates to data previously entered. As a result, data extracted from CCM and the Local Systems represent a snapshot at the time of extraction and may differ from previous or subsequent reports.

Ontario population projection data for 2020 were sourced from Ministry, IntelliHEALTH Ontario. Data were extracted on November 26, 2019. Ontario population projection data for 2020 were sourced from Ministry, IntelliHEALTH Ontario. Data were extracted on November 26, 2019.

COVID-19 test data were based on information from The Provincial COVID-19 Diagnostics Network, reported by member microbiology laboratories. COVID-19 test data were based on information from The Provincial COVID-19 Diagnostics Network, reported by member microbiology laboratories.

Data Caveats The data only represent cases reported to public health units and recorded in CCM plus. As a result, all counts will be subject to varying degrees of underreporting due to a variety of factors, such as disease awareness and medical care seeking behaviours, which may depend on severity of illness, clinical practice, changes in laboratory testing, and reporting behaviours. The data only represent cases reported to public health units and recorded in CCM plus. As a result, all counts will be subject to varying degrees of underreporting due to a variety of factors, such as disease awareness and medical care seeking behaviours, which may depend on severity of illness, clinical practice, changes in laboratory testing, and reporting behaviours. The data only represent cases reported to public health units and recorded in CCM plus. As a result, all counts will be subject to varying degrees of underreporting due to a variety of factors, such as disease awareness and medical care seeking behaviours, which may depend on severity of illness, clinical practice, changes in laboratory testing, and reporting behaviours.

Lags in CCM plus data entry due to weekend staffing may result in lower case counts than would otherwise be recorded. Lags in CCM plus data entry due to weekend staffing may result in lower case counts than would otherwise be recorded.

Only cases meeting the confirmed case classification as listed in the MOH Only cases meeting the confirmed case classification as listed in the MOH Only cases meeting the confirmed case classification as listed in the MOH COVID-19 case definitionCOVID-19 case definition

are included in the report counts from CCM plus. This includes persons with a positive detection of serum/plasma immunoglobulin G (IgG) antibodies to SARS-CoV-2, which was added to the confirmed case definition on August 6, 2020.

The number of tests performed does not reflect the number of specimens or persons tested. More than one test may be performed per specimen or per person. As such, the percentage of tests that were positive does not necessarily translate to the number of specimens or persons testing positive. The number of tests performed does not reflect the number of specimens or persons tested. More than one test may be performed per specimen or per person. As such, the percentage of tests that were positive does not necessarily translate to the number of specimens or persons testing positive.

Reported date is the date the case was reported to the public health unit. Reported date is the date the case was reported to the public health unit.

Case episode date is based on an estimate of the best date of disease onset. This date is calculated based on either the date of symptom onset, specimen collection/test date, or the date reported to the public health unit. Case episode date is based on an estimate of the best date of disease onset. This date is calculated based on either the date of symptom onset, specimen collection/test date, or the date reported to the public health unit. Case episode date is based on an estimate of the best date of disease onset. This date is calculated based on either the date of symptom onset, specimen collection/test date, or the date reported to the public health unit.

Resolved cases are determined only for COVID-19 cases that have not died. Cases that have died are considered fatal and not resolved. The following cases are classified as resolved: Resolved cases are determined only for COVID-19 cases that have not died. Cases that have died are considered fatal and not resolved. The following cases are classified as resolved:

Cases that are reported as ‘recovered’ in CCM Cases that are reported as ‘recovered’ in CCM

Cases that are not hospitalized and are 14 days past their episode date Cases that are not hospitalized and are 14 days past their episode date

Cases that are currently hospitalized (no hospital end date entered) and have a status of ‘closed’ in CCM (indicating public health unit follow-up is complete) and are 14 days past their symptom onset date or specimen collection date Cases that are currently hospitalized (no hospital end date entered) and have a status of ‘closed’ in CCM (indicating public health unit follow-up is complete) and are 14 days past their symptom onset date or specimen collection date

Hospitalization includes all cases for which a hospital admission date was reported at the time of data extraction. It includes cases that have been discharged from hospital as well as cases that are currently hospitalized. Emergency room visits are not included in the number of reported hospitalizations. Hospitalization includes all cases for which a hospital admission date was reported at the time of data extraction. It includes cases that have been discharged from hospital as well as cases that are currently hospitalized. Emergency room visits are not included in the number of reported hospitalizations.

ICU admission includes all cases for which an ICU admission date was reported at the time of data extraction. It is a subset of the count of hospitalized cases. It includes cases that have been treated or that are currently being treated in an ICU. ICU admission includes all cases for which an ICU admission date was reported at the time of data extraction. It is a subset of the count of hospitalized cases. It includes cases that have been treated or that are currently being treated in an ICU.

Orientation of case counts by geography is based on the diagnosing health unit (DHU). DHU refers to the case's public health unit of residence at the time of illness onset and not necessarily the location of exposure. Cases for which the DHU was reported as MOH (to signify a case that is not a resident of Ontario) have been excluded from the analyses. Orientation of case counts by geography is based on the diagnosing health unit (DHU). DHU refers to the case's public health unit of residence at the time of illness onset and not necessarily the location of exposure. Cases for which the DHU was reported as MOH (to signify a case that is not a resident of Ontario) have been excluded from the analyses.

Likely source of acquisition is determined by examining the epidemiologic link and epidemiologic link status fields in CCM and local systems. If no epidemiologic link is identified in those fields the risk factor fields are examined to determine whether a case travelled, was associated with a confirmed outbreak, was a contact of a case, had no known epidemiological link (sporadic community transmission) or was reported to have an unknown source/no information was reported. Some cases may have no informati Likely source of acquisition is determined by examining the epidemiologic link and epidemiologic link status fields in CCM and local systems. If no epidemiologic link is identified in those fields the risk factor fields are examined to determine whether a case travelled, was associated with a confirmed outbreak, was a contact of a case, had no known epidemiological link (sporadic community transmission) or was reported to have an unknown source/no information was reported. Some cases may have no informati

For cases with an episode date on or after April 1, 2020: Outbreak-associated > close contact of a confirmed case > travel > no known epidemiological link > information missing or unknown For cases with an episode date on or after April 1, 2020: Outbreak-associated > close contact of a confirmed case > travel > no known epidemiological link > information missing or unknown

For cases with an episode date before April 1, 2020: Travel > outbreak-associated > close contact of a confirmed case > no known epidemiological link > information missing or unknown For cases with an episode date before April 1, 2020: Travel > outbreak-associated > close contact of a confirmed case > no known epidemiological link > information missing or unknown

Deaths are determined by using the outcome field in CCM plus. Any case marked ‘Fatal’ is included in the deaths data. The CCM field Type of Death is not used to further categorize the data. Deaths are determined by using the outcome field in CCM plus. Any case marked ‘Fatal’ is included in the deaths data. The CCM field Type of Death is not used to further categorize the data.

The date of death is determined using the outcome date field for cases marked as ‘Fatal’ in the outcome field. The date of death is determined using the outcome date field for cases marked as ‘Fatal’ in the outcome field. The date of death is determined using the outcome date field for cases marked as ‘Fatal’ in the outcome field.

COVID-19 cases from CCM plus for which the Classification and/or Disposition was reported as ENTERED IN ERROR, DOES NOT MEET DEFINITION, IGNORE, DUPLICATE, or any variation on these values have been excluded. The provincial case count for COVID-19 includes cases that are counted once across all systems from which the case data are obtained. Duplicate records may exist if these records were not identified and resolved prior to data upload to the Ministry. COVID-19 cases from CCM plus for which the Classification and/or Disposition was reported as ENTERED IN ERROR, DOES NOT MEET DEFINITION, IGNORE, DUPLICATE, or any variation on these values have been excluded. The provincial case count for COVID-19 includes cases that are counted once across all systems from which the case data are obtained. Duplicate records may exist if these records were not identified and resolved prior to data upload to the Ministry.

Ongoing outbreaks include all outbreaks that are ‘Open’ in CCM plus without a ‘Declared Over Date’ recorded, or where the outbreak started more than five months ago, even for outbreaks where the Outbreak Status value selected in CCM/iPHIS is 'OPEN'. The start of the outbreak is determined by the onset date of first case, or if missing the outbreak reported date, or else if that is also missing, then the outbreak created date. Ongoing outbreaks include all outbreaks that are ‘Open’ in CCM plus without a ‘Declared Over Date’ recorded, or where the outbreak started more than five months ago, even for outbreaks where the Outbreak Status value selected in CCM/iPHIS is 'OPEN'. The start of the outbreak is determined by the onset date of first case, or if missing the outbreak reported date, or else if that is also missing, then the outbreak created date.

‘Long-term care home residents’ includes cases that reported ‘Yes’ to the risk factor ‘Resident of a long-term care home’; or ‘Yes’ to the risk factor ‘Resident of nursing home or other chronic care facility’ and reported to be part of an outbreak assigned as a long-term care home (via the Outbreak number or case comments field); or were reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field) with an age over 70 years and did not report ‘No’ t ‘Long-term care home residents’ includes cases that reported ‘Yes’ to the risk factor ‘Resident of a long-term care home’; or ‘Yes’ to the risk factor ‘Resident of nursing home or other chronic care facility’ and reported to be part of an outbreak assigned as a long-term care home (via the Outbreak number or case comments field); or were reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field) with an age over 70 years and did not report ‘No’ t

The ‘health care workers’ variable includes cases that reported ‘Yes’ to any of the occupation of health care worker, doctor, nurse, dentist, dental hygienist, midwife, other medical technicians, personal support worker, respiratory therapist, first responder. The ‘health care workers’ variable includes cases that reported ‘Yes’ to any of the occupation of health care worker, doctor, nurse, dentist, dental hygienist, midwife, other medical technicians, personal support worker, respiratory therapist, first responder.

‘Health care workers associated with long-term care outbreaks’ includes ‘health care workers’ reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field). Excludes cases that reported ‘Yes’ to risk factors ‘Resident of long-term care home’ or ‘Resident of nursing home or other chronic care facility’ and ‘Yes’ to the calculated ‘health care workers’ variable. ‘Health care workers associated with long-term care outbreaks’ includes ‘health care workers’ reported to be part of an outbreak assigned as a long-term care home (via the outbreak number or case comments field). Excludes cases that reported ‘Yes’ to risk factors ‘Resident of long-term care home’ or ‘Resident of nursing home or other chronic care facility’ and ‘Yes’ to the calculated ‘health care workers’ variable.

Percent change is calculated by taking the difference between the current period (i.e., daily count or sum of the daily count over a 7-day period) and previous period (i.e., daily count or sum of the daily count over a 7-day period), divided by the previous period. Percent change is calculated by taking the difference between the current period (i.e., daily count or sum of the daily count over a 7-day period) and previous period (i.e., daily count or sum of the daily count over a 7-day period), divided by the previous period.

Appendix A Table A1. Weekly rates of confirmed COVID-19 cases per 100,000 population over recent rolling 7-day periods, by reported date and public health unit: Ontario, December 17, 2020 to December 29, 2020 TableTRTHSpanPublic Health Unit Name

THSpanDec 17 to Dec 23







THSpan% change from Dec 17-23 to Dec 23-29

Span

TRTDSpanNORTH WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanNorthwestern Health Unit

TDSpan11.4

TDSpan19.4

TDSpan19.4

TDSpan22.8

TDSpan24.0

TDSpan19.4

TDSpan19.4

TDSpan+70.2%

TRTDSpanThunder Bay District Health Unit

TDSpan59.3

TDSpan52.0

TDSpan48.0

TDSpan40.0

TDSpan41.3

TDSpan38.0

TDSpan26.0

TDSpan-56.2%

TRTDSpanNORTH EAST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanAlgoma Public Health

TDSpan1.7

TDSpan1.7

TDSpan1.7

TDSpan2.6

TDSpan2.6

TDSpan2.6

TDSpan1.7

TDSpan0.0%

TRTDSpanNorth Bay Parry Sound District Health Unit

TDSpan10.8

TDSpan12.3

TDSpan10.0

TDSpan10.0

TDSpan8.5

TDSpan9.2

TDSpan9.2

TDSpan-14.8%

TRTDSpanPorcupine Health Unit

TDSpan10.8

TDSpan9.6

TDSpan9.6

TDSpan7.2

TDSpan8.4

TDSpan3.6

TDSpan1.2

TDSpan-88.9%

TRTDSpanPublic Health Sudbury & Districts

TDSpan6.0

TDSpan5.5

TDSpan6.5

TDSpan6.5

TDSpan6.0

TDSpan7.0

TDSpan8.0

TDSpan+33.3%

TRTDSpanTimiskaming Health Unit

TDSpan61.2

TDSpan70.4

TDSpan79.5

TDSpan76.5

TDSpan76.5

TDSpan67.3

TDSpan70.4

TDSpan+15.0%

TRTDSpanEASTERN

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanOttawa Public Health

TDSpan29.8

TDSpan31.6

TDSpan37.1

TDSpan34.5

TDSpan38.3

TDSpan40.0

TDSpan46.5

TDSpan+56.0%

Span










Span

TRTDSpanEastern Ontario Health Unit

TDSpan50.3

TDSpan54.1

TDSpan51.7

TDSpan49.4

TDSpan54.1

TDSpan58.0

TDSpan66.6

TDSpan+32.4%

TRTDSpanHastings Prince Edward Public Health

TDSpan16.6

TDSpan14.8

TDSpan11.3

TDSpan9.5

TDSpan9.5

TDSpan8.9

TDSpan10.7

TDSpan-35.5%

TRTDSpanKingston, Frontenac and Lennox & Addington Public Health

TDSpan27.3

TDSpan27.3

TDSpan22.1

TDSpan24.4

TDSpan21.2

TDSpan22.6

TDSpan19.3

TDSpan-29.3%

TRTDSpanLeeds, Grenville & Lanark District Health Unit

TDSpan13.9

TDSpan12.1

TDSpan9.8

TDSpan9.8

TDSpan11.5

TDSpan13.9

TDSpan19.6

TDSpan+41.0%

TRTDSpanRenfrew County and District Health Unit

TDSpan12.9

TDSpan10.1

TDSpan12.0

TDSpan9.2

TDSpan10.1

TDSpan10.1

TDSpan11.0

TDSpan-14.7%

TRTDSpanCENTRAL EAST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanDurham Region Health Department

TDSpan96.6

TDSpan92.2

TDSpan89.4

TDSpan87.9

TDSpan84.1

TDSpan84.9

TDSpan87.9

TDSpan-9.0%

TRTDSpanHaliburton, Kawartha, Pine Ridge District Health Unit

TDSpan25.9

TDSpan26.5

TDSpan25.4

TDSpan22.8

TDSpan21.2

TDSpan20.6

TDSpan21.7

TDSpan-16.2%

TRTDSpanPeel Public Health

TDSpan194.7

TDSpan190.8

TDSpan182.6

TDSpan177.0

TDSpan173.9

TDSpan173.9

TDSpan178.0

TDSpan-8.6%

Span










Span

TRTDSpanPeterborough Public Health

TDSpan18.9

TDSpan21.6

TDSpan31.8

TDSpan30.4

TDSpan33.8

TDSpan31.1

TDSpan30.4

TDSpan+60.8%

TRTDSpanSimcoe Muskoka District Health Unit

TDSpan59.5

TDSpan57.9

TDSpan58.4

TDSpan57.4

TDSpan56.9

TDSpan61.0

TDSpan59.9

TDSpan+0.7%

TRTDSpanYork Region Public Health

TDSpan129.9

TDSpan130.9

TDSpan129.7

TDSpan121.8

TDSpan114.5

TDSpan125.8

TDSpan136.9

TDSpan+5.4%

TRTDSpanTORONTO

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanToronto Public Health

TDSpan145.2

TDSpan141.1

TDSpan141.5

TDSpan146.2

TDSpan142.1

TDSpan147.4

TDSpan153.0

TDSpan+5.4%

TRTDSpanSOUTH WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanChatham-Kent Public Health

TDSpan37.6

TDSpan35.7

TDSpan45.1

TDSpan46.1

TDSpan52.7

TDSpan64.0

TDSpan75.2

TDSpan+100.0%

TRTDSpanGrey Bruce Health Unit

TDSpan22.4

TDSpan20.6

TDSpan21.2

TDSpan20.6

TDSpan19.4

TDSpan17.7

TDSpan15.9

TDSpan-29.0%

TRTDSpanHuron Perth Public Health

TDSpan52.2

TDSpan63.0

TDSpan65.1

TDSpan76.6

TDSpan74.4

TDSpan73.7

TDSpan78.0

TDSpan+49.4%

TRTDSpanLambton Public Health

TDSpan77.1

TDSpan77.1

TDSpan81.7

TDSpan104.6

TDSpan115.3

TDSpan125.2

TDSpan123.7

TDSpan+60.4%

TRTDSpanMiddlesex-London Health Unit

TDSpan99.5

TDSpan93.4

TDSpan88.5

TDSpan91.6

TDSpan92.2

TDSpan95.2

TDSpan103.0

TDSpan+3.5%

TRTDSpanSouthwestern Public Health

TDSpan97.9

TDSpan97.9

TDSpan105.4

TDSpan102.1

TDSpan109.2

TDSpan102.6

TDSpan112.1

TDSpan+14.5%

TRTDSpanWindsor-Essex County Health Unit

TDSpan277.1

TDSpan258.2

TDSpan271.4

TDSpan272.1

TDSpan270.5

TDSpan270.5

TDSpan262.7

TDSpan-5.2%

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TRTDSpanCENTRAL WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanBrant County Health Unit

TDSpan63.1

TDSpan51.5

TDSpan50.3

TDSpan50.3

TDSpan51.5

TDSpan61.2

TDSpan61.2

TDSpan-3.0%

TRTDSpanCity of Hamilton Public Health Services

TDSpan123.1

TDSpan108.4

TDSpan109.1

TDSpan106.7

TDSpan115.2

TDSpan123.1

TDSpan128.2

TDSpan+4.1%

TRTDSpanHaldimand-Norfolk Health Unit

TDSpan71.0

TDSpan76.3

TDSpan72.8

TDSpan57.0

TDSpan60.5

TDSpan53.5

TDSpan60.5

TDSpan-14.8%

TRTDSpanHalton Region Public Health

TDSpan83.5

TDSpan87.9

TDSpan83.7

TDSpan86.4

TDSpan86.4

TDSpan94.7

TDSpan93.4

TDSpan+11.9%

TRTDSpanNiagara Region Public Health

TDSpan125.1

TDSpan131.9

TDSpan114.3

TDSpan109.8

TDSpan117.9

TDSpan121.9

TDSpan127.8

TDSpan+2.2%

TRTDSpanRegion of Waterloo Public Health and Emergency Services

TDSpan110.7

TDSpan109.2

TDSpan104.4

TDSpan97.0

TDSpan91.4

TDSpan88.0

TDSpan93.8

TDSpan-15.3%

TRTDSpanWellington-Dufferin-Guelph Public Health

TDSpan103.6

TDSpan105.5

TDSpan93.6

TDSpan95.2

TDSpan98.4

TDSpan102.9

TDSpan102

TDSpan-1.5%

TRTDSpanTOTAL ONTARIO

TDSpan109.0

TDSpan106.7

TDSpan105.2

TDSpan104.4

TDSpan103.4

TDSpan106.7

TDSpan110.7

TDSpan+1.6%

Span

Note: Rates are based on the sum of the daily case counts during the date ranges specified in each column. Data Source: CCM plus Disclaimer This document was developed by Public Health Ontario (PHO). PHO provides scientific and technical advice to Ontario’s government, public health organizations and health care providers. PHO’s work is guided by the current best available evidence at the time of publication. The application and use of this document is the responsibility of the user. PHO assumes no liability resulting from any such application or use. This document may be reproduced without permission for non-commercial purposes only and provided that appropriate credit is given to PHO. No changes and/or modifications may be made to this document without express written permission from PHO. Citation Ontario Agency for Health Protection and Promotion (Public Health Ontario). Epidemiologic summary: COVID-19 in Ontario – January 15, 2020 to January 1, 2021. Toronto, ON: Queen’s Printer for Ontario; 2021. For Further Information For more information, email For more information, email [email protected]@oahpp.ca

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Public Health Ontario Public Health Ontario is an agency of the Government of Ontario dedicated to protecting and promoting the health of all Ontarians and reducing inequities in health. Public Health Ontario links public health practitioners, front-line health workers and researchers to the best scientific intelligence and knowledge from around the world. For more information about PHO, visit For more information about PHO, visit publichealthontario.capublichealthontario.ca

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covid-19 in ontario: january 15, 2020 to january 1, 2020 · covid-19 in ontario: january 15, 2020...

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