covid-19 in ontario: january 15, 2020 to december 20, 2020...2020/12/21 · 10 8 456 241.4 peel...

COVID-19 in Ontario: January 15, 2020 to December 20, 2020 1

Daily Epidemiologic Summary

COVID-19 in Ontario: January 15, 2020 to December 20, 2020

This report includes the most current information available from CCM and other case management systems (CCM plus) as of December 20, 2020.

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 158,053 confirmed cases of COVID-19 in Ontario reported to date.

Compared to the previous day, this represents:

An increase of 2,123 confirmed cases (percent change of -8.3%)

An increase of 17 deaths (percent change of -32.0%)

An increase of 1,654 resolved cases (percent change of -14.3%)

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 19

Change in cases

December 20

Percentage change

December 20 compared to December 19

Cumulative case count

as of December 20

Total number of cases 2,316 2,123 -8.3% 158,053

Number of deaths 25 17 -32.0% 4,167

Number resolved 1,931 1,654 -14.3% 134,867

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


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

Change in cases

December 19

Change in cases

December 20


as of December 20

Gender: Male 1,146 1,033 77,548

Gender: Female 1,157 1,075 79,521

Ages: 19 and under 345 293 20,261

Ages: 20-39 764 785 57,756

Ages: 40-59 704 577 45,297

Ages: 60-79 335 314 22,673

Ages: 80 and over 163 153 12,032

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 to December 20, 2020: Ontario

Change in cases

December 19

Change in cases

December 20

Cumulative case count from August 30 to

December 20

Ages: 4 to 8 59 52 3,226

Ages: 9 to 13 77 73 4,472

Ages: 14 to 17 100 69 4,334

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

Long-term care home cases Change in cases

December 19

Change in cases

December 20

Cumulative case count as of December 20

Residents 90 93 9,938

Health care workers 29 48 3,917

Deaths among residents 18 17 2,581

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. 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 December 20, 2020

Data Source: CCM plus


Figure 2. Confirmed cases of COVID-19 by likely acquisition and approximation of symptom onset date: Ontario, January 15, 2020 to December 20, 2020

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 19, 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.


Severity

Figure 4. Confirmed deaths among COVID-19 cases by date of death: Ontario, March 1, 2020 to December 20, 2020

Note: Cases without a death date are not included in the figure. Data Source: CCM plus


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

Blank cell Cumulative case count

as of December 20 Percentage of all

cases

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

4,167 2.6%

Deaths reported in ages: 19 and under 1


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 19

Change in cases

December 20


Cumulative rate per 100,000 population

Northwestern Health Unit 2 1 140 159.7

Thunder Bay District Health Unit 8 9 501 334.1

TOTAL NORTH WEST 10 10 641 269.7

Algoma Public Health -1 1 63 55.1

North Bay Parry Sound District Health Unit

4 0 108 83.2

Porcupine Health Unit 0 2 121 145.0

Public Health Sudbury & Districts -1 2 251 126.1

Timiskaming Health Unit 7 2 39 119.3

TOTAL NORTH EAST 9 7 582 104.1

Ottawa Public Health 38 32 9,370 888.4

Eastern Ontario Health Unit 22 11 1,193 571.6

Hastings Prince Edward Public Health

7 6 250 148.4

Kingston, Frontenac and Lennox & Addington Public Health

13 6 466 219.1

Leeds, Grenville & Lanark District Health Unit

3 0 633 365.5

Renfrew County and District Health Unit

5 2 217 199.8

TOTAL EASTERN 88 57 12,129 629.6



cases December 19

Change in cases

December 20



Durham Region Health Department 82 91 6,271 880.3

Haliburton, Kawartha, Pine Ridge District Health Unit

10 8 456 241.4

Peel Public Health 468 480 34,947 2176.1

Peterborough Public Health 4 6 270 182.5

Simcoe Muskoka District Health Unit

62 61 3,076 513.0

York Region Public Health 326 192 14,855 1,211.9

TOTAL CENTRAL EAST 952 838 59,875 1,336.3

Toronto Public Health 486 611 51,841 1,661.4

TOTAL TORONTO 486 611 51,841 1,661.4

Chatham-Kent Public Health 6 1 583 548.4

Grey Bruce Health Unit 9 6 410 241.3

Huron Perth Public Health 14 4 534 382.1

Lambton Public Health 19 8 521 397.8

Middlesex-London Health Unit 80 64 2,472 487.1

Southwestern Public Health 25 21 937 443.0

Windsor-Essex County Health Unit 151 138 5,841 1,374.9

TOTAL SOUTH WEST 304 242 11,298 668.2

Brant County Health Unit 5 16 834 537.4

City of Hamilton Public Health Services

88 36 4,916 830.2



cases December 19

Change in cases

December 20



Haldimand-Norfolk Health Unit 10 19 778 682.0

Halton Region Public Health 97 92 4,852 783.7

Niagara Region Public Health 128 68 3,113 658.9

Region of Waterloo Public Health and Emergency Services

91 94 5,045 863.3

Wellington-Dufferin-Guelph Public Health

48 33 2,149 689.0

TOTAL CENTRAL WEST 467 358 21,687 761.1

TOTAL ONTARIO 2,316 2,123 158,053 1,063.3

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


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 19

Change in outbreaks

December 20

Number of ongoing

outbreaks

Cumulative number of outbreaks reported

Long-term care homes 8 10 168 841

Retirement homes 4 5 94 435

Hospitals 2 1 52 217

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:

Information extracted from the Ontario Ministry of Health (Ministry) integrated Public Health Information System (iPHIS) database for Toronto Public Health as of December 20, 2020 at 1 p.m.

Information successfully uploaded to the Ministry from Local Systems: Toronto Public Health (Coronavirus Rapid Entry System) CORES as of December 20, 2020 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 December 20, 2020 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 5, 2020 to December 17, 2020

Public Health Unit Name

Dec 5 to

Dec 11

Dec 6 to

Dec 12

Dec 7 to

Dec 13

Dec 8 to

Dec 14

Dec 9 to

Dec 15

Dec 10 to

Dec 16

Dec 11 to

Dec 17

% change from

Dec 5-11 to Dec 11-

17

NORTH WEST

Northwestern Health Unit

9.1 6.8 5.7 5.7 3.4 3.4 3.4 -62.6%

Thunder Bay District Health Unit

45.3 41.3 40.7 43.3 36.7 32.0 37.3 -17.7%

NORTH EAST

Algoma Public Health

0.9 0.9 0.9 0.9 0.9 0.9 0.0 -100.0%

North Bay Parry Sound District Health Unit

5.4 4.6 4.6 4.6 4.6 9.2 10.8 100.0%

Porcupine Health Unit

0.0 1.2 2.4 2.4 2.4 2.4 3.6 N/A

Public Health Sudbury & Districts

4.5 5.0 3.5 3.5 3.5 3.5 4.5 0.0%

Timiskaming Health Unit

24.5 21.4 21.4 18.4 12.2 15.3 15.3 -37.6%

EASTERN

Ottawa Public Health

30.2 30.1 29.9 30.9 29.2 29.9 30.9 +2.3%



Dec 5 to

Dec 11

Dec 6 to

Dec 12

Dec 7 to

Dec 13

Dec 8 to

Dec 14

Dec 9 to

Dec 15

Dec 10 to

Dec 16

Dec 11 to

Dec 17

% change from

Dec 5-11 to Dec 11-

17

Eastern Ontario Health Unit

60.4 65.2 51.7 53.2 55.1 58.9 55.6 -7.9%

Hastings Prince Edward Public Health

27.9 28.5 29.7 31.5 26.1 22.0 14.2 -49.1%

Kingston, Frontenac and Lennox & Addington Public Health

41.4 40.9 40.9 44.2 44.2 43.7 40.9 -1.2%

Leeds, Grenville & Lanark District Health Unit

41.6 41.6 40.4 38.1 33.5 31.8 26.6 -36.1%

Renfrew County and District Health Unit

38.7 41.4 36.8 29.5 29.5 17.5 18.4 -52.5%

CENTRAL EAST

Durham Region Health Department

88.2 77.6 74.8 75.4 83.5 87.3 88.9 +0.8%

Haliburton, Kawartha, Pine Ridge District Health Unit

28.1 31.2 34.4 33.9 34.9 30.7 27.0 -3.9%

Peel Public Health

195.0 185.2 184.6 197.9 197.6 194.0 194.0 -0.5%



Dec 5 to

Dec 11

Dec 6 to

Dec 12

Dec 7 to

Dec 13

Dec 8 to

Dec 14

Dec 9 to

Dec 15

Dec 10 to

Dec 16

Dec 11 to

Dec 17

% change from

Dec 5-11 to Dec 11-

17

Peterborough Public Health

10.8 12.2 13.5 12.8 14.2 15.5 15.5 +43.5%

Simcoe Muskoka District Health Unit

54.7 53.7 49.7 47.7 46.7 52.4 55.7 +1.8%

York Region Public Health

106.6 102.7 103.3 101.9 103.0 101.1 103.9 -2.5%

TORONTO

Toronto Public Health

120.7 120.8 124.2 130.6 135.5 142.4 145.4 +20.5%

SOUTH WEST

Chatham-Kent Public Health

21.6 22.6 20.7 23.5 24.5 24.5 32.0 +48.1%

Grey Bruce Health Unit

17.7 19.4 20.6 20.0 17.7 16.5 16.5 -6.8%

Huron Perth Public Health

44.4 47.9 45.1 43.6 55.8 60.1 59.4 +33.8%

Lambton Public Health

15.3 16.0 18.3 16.0 19.9 24.4 35.9 +134.6%

Middlesex-London Health Unit

51.4 52.4 54.0 58.1 50.8 55.0 62.3 +21.2%

Southwestern Public Health

49.6 56.7 65.7 64.8 73.8 79.4 79.4 +60.1%

Windsor-Essex County Health Unit

145.5 149.7 173.0 172.8 188.5 211.4 241.0 +65.6%



Dec 5 to

Dec 11

Dec 6 to

Dec 12

Dec 7 to

Dec 13

Dec 8 to

Dec 14

Dec 9 to

Dec 15

Dec 10 to

Dec 16

Dec 11 to

Dec 17

% change from

Dec 5-11 to Dec 11-

17

CENTRAL WEST

Brant County Health Unit

46.4 54.8 65.1 70.9 72.2 70.9 77.3 +66.6%

City of Hamilton Public Health Services

92.5 101.3 110.6 107.1 111.5 116.7 127.7 +38.1%

Haldimand-Norfolk Health Unit

46.5 46.5 46.5 48.2 45.6 44.7 41.2 -11.4%

Halton Region Public Health

70.4 68.3 70.7 64.6 68.2 71.7 74.1 +5.3%

Niagara Region Public Health

55.0 60.1 63.9 68.4 74.9 76.6 79.4 +44.4%

Region of Waterloo Public Health and Emergency Services

78.0 77.3 81.3 79.9 84.7 87.3 86.9 +11.4%

Wellington-Dufferin-Guelph Public Health

80.5 87.5 88.8 88.5 88.2 94.6 93.9 +16.6%

TOTAL ONTARIO

88.9 88.1 90.0 92.5 94.9 97.6 100.5 +13.0%

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 December 20, 2020. Toronto, ON: Queen’s Printer for Ontario; 2020.

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 December 20, 2020 This report includes the most current information available from CCM and other case management systems (CCM plus) as of December 20, 2020. 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 TableTRTHSpan There are a total of 158,053 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 158,053 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 158,053 confirmed cases of COVID-19 in Ontario reported to date.

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

TRTDSpan An increase of 2,123 confirmed cases (percent change of -8.3%) An increase of 2,123 confirmed cases (percent change of -8.3%) An increase of 2,123 confirmed cases (percent change of -8.3%)

TRTDSpan An increase of 17 deaths (percent change of -32.0%) An increase of 17 deaths (percent change of -32.0%) An increase of 17 deaths (percent change of -32.0%)

TRTDSpan An increase of 1,654 resolved cases (percent change of -14.3%) An increase of 1,654 resolved cases (percent change of -14.3%) An increase of 1,654 resolved cases (percent change of -14.3%)

TRTDSpan

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 19


THSpanPercentage change December 20 compared to December 19

THSpanCumulative case count as of December 20

Span

TRTDSpanTotal number of cases

TDSpan2,316

TDSpan2,123

TDSpan-8.3%

TDSpan158,053

TRTDSpanNumber of deaths

TDSpan25

TDSpan17

TDSpan-32.0%

TDSpan4,167

TRTDSpanNumber resolved

TDSpan1,931

TDSpan1,654

TDSpan-14.3%

TDSpan134,867

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




Span

TRTDSpanGender: Male

TDSpan1,146

TDSpan1,033

TDSpan77,548

TRTDSpanGender: Female

TDSpan1,157

TDSpan1,075

TDSpan79,521

TRTDSpanAges: 19 and under

TDSpan345

TDSpan293

TDSpan20,261

TRTDSpanAges: 20-39

TDSpan764

TDSpan785

TDSpan57,756

TRTDSpanAges: 40-59

TDSpan704

TDSpan577

TDSpan45,297

TRTDSpanAges: 60-79

TDSpan335

TDSpan314

TDSpan22,673

TRTDSpanAges: 80 and over

TDSpan163

TDSpan153

TDSpan12,032

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 to December 20, 2020: Ontario TableTRTHSpan



THSpanCumulative case count from August 30 to December 20

Span

TRTDSpanAges: 4 to 8

TDSpan59

TDSpan52

TDSpan3,226


TDSpan77

TDSpan73

TDSpan4,472


TDSpan100

TDSpan69

TDSpan4,334

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

TDSpan90

TDSpan93

TDSpan9,938

TRTDSpanHealth care workers

TDSpan29

TDSpan48

TDSpan3,917

TRTDSpanDeaths among residents

TDSpan18

TDSpan17

TDSpan2,581

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 December 20, 2020 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 December 20, 2020 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 19, 2020 Figure 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. Severity Figure 4. Confirmed deaths among COVID-19 cases by date of death: Ontario, March 1, 2020 to December 20, 2020 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)

TDSpan4,167

TDSpan2.6%

TRTDSpanDeaths reported in ages: 19 and under

TDSpan1

TDSpan 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 5, 2020 to December 17, 2020 TableTRTHSpanPublic Health Unit Name

THSpanDec 5 to Dec 11







THSpan% change from Dec 5-11 to Dec 11-17

Span

TRTDSpanNORTH WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanNorthwestern Health Unit

TDSpan9.1

TDSpan6.8

TDSpan5.7

TDSpan5.7

TDSpan3.4

TDSpan3.4

TDSpan3.4

TDSpan-62.6%

TRTDSpanThunder Bay District Health Unit

TDSpan45.3

TDSpan41.3

TDSpan40.7

TDSpan43.3

TDSpan36.7

TDSpan32.0

TDSpan37.3

TDSpan-17.7%

TRTDSpanNORTH EAST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanAlgoma Public Health

TDSpan0.9

TDSpan0.9

TDSpan0.9

TDSpan0.9

TDSpan0.9

TDSpan0.9

TDSpan0.0

TDSpan-100.0%

TRTDSpanNorth Bay Parry Sound District Health Unit

TDSpan5.4

TDSpan4.6

TDSpan4.6

TDSpan4.6

TDSpan4.6

TDSpan9.2

TDSpan10.8

TDSpan100.0%

TRTDSpanPorcupine Health Unit

TDSpan0.0

TDSpan1.2

TDSpan2.4

TDSpan2.4

TDSpan2.4

TDSpan2.4

TDSpan3.6

TDSpanN/A

TRTDSpanPublic Health Sudbury & Districts

TDSpan4.5

TDSpan5.0

TDSpan3.5

TDSpan3.5

TDSpan3.5

TDSpan3.5

TDSpan4.5

TDSpan0.0%

TRTDSpanTimiskaming Health Unit

TDSpan24.5

TDSpan21.4

TDSpan21.4

TDSpan18.4

TDSpan12.2

TDSpan15.3

TDSpan15.3

TDSpan-37.6%

TRTDSpanEASTERN

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanOttawa Public Health

TDSpan30.2

TDSpan30.1

TDSpan29.9

TDSpan30.9

TDSpan29.2

TDSpan29.9

TDSpan30.9

TDSpan+2.3%

Span

TableTRTHSpanPublic Health Unit Name









Span

TRTDSpanEastern Ontario Health Unit

TDSpan60.4

TDSpan65.2

TDSpan51.7

TDSpan53.2

TDSpan55.1

TDSpan58.9

TDSpan55.6

TDSpan-7.9%

TRTDSpanHastings Prince Edward Public Health

TDSpan27.9

TDSpan28.5

TDSpan29.7

TDSpan31.5

TDSpan26.1

TDSpan22.0

TDSpan14.2

TDSpan-49.1%

TRTDSpanKingston, Frontenac and Lennox & Addington Public Health

TDSpan41.4

TDSpan40.9

TDSpan40.9

TDSpan44.2

TDSpan44.2

TDSpan43.7

TDSpan40.9

TDSpan-1.2%

TRTDSpanLeeds, Grenville & Lanark District Health Unit

TDSpan41.6

TDSpan41.6

TDSpan40.4

TDSpan38.1

TDSpan33.5

TDSpan31.8

TDSpan26.6

TDSpan-36.1%

TRTDSpanRenfrew County and District Health Unit

TDSpan38.7

TDSpan41.4

TDSpan36.8

TDSpan29.5

TDSpan29.5

TDSpan17.5

TDSpan18.4

TDSpan-52.5%

TRTDSpanCENTRAL EAST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanDurham Region Health Department

TDSpan88.2

TDSpan77.6

TDSpan74.8

TDSpan75.4

TDSpan83.5

TDSpan87.3

TDSpan88.9

TDSpan+0.8%

TRTDSpanHaliburton, Kawartha, Pine Ridge District Health Unit

TDSpan28.1

TDSpan31.2

TDSpan34.4

TDSpan33.9

TDSpan34.9

TDSpan30.7

TDSpan27.0

TDSpan-3.9%

TRTDSpanPeel Public Health

TDSpan195.0

TDSpan185.2

TDSpan184.6

TDSpan197.9

TDSpan197.6

TDSpan194.0

TDSpan194.0

TDSpan-0.5%

Span










Span

TRTDSpanPeterborough Public Health

TDSpan10.8

TDSpan12.2

TDSpan13.5

TDSpan12.8

TDSpan14.2

TDSpan15.5

TDSpan15.5

TDSpan+43.5%

TRTDSpanSimcoe Muskoka District Health Unit

TDSpan54.7

TDSpan53.7

TDSpan49.7

TDSpan47.7

TDSpan46.7

TDSpan52.4

TDSpan55.7

TDSpan+1.8%

TRTDSpanYork Region Public Health

TDSpan106.6

TDSpan102.7

TDSpan103.3

TDSpan101.9

TDSpan103.0

TDSpan101.1

TDSpan103.9

TDSpan-2.5%

TRTDSpanTORONTO

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanToronto Public Health

TDSpan120.7

TDSpan120.8

TDSpan124.2

TDSpan130.6

TDSpan135.5

TDSpan142.4

TDSpan145.4

TDSpan+20.5%

TRTDSpanSOUTH WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanChatham-Kent Public Health

TDSpan21.6

TDSpan22.6

TDSpan20.7

TDSpan23.5

TDSpan24.5

TDSpan24.5

TDSpan32.0

TDSpan+48.1%

TRTDSpanGrey Bruce Health Unit

TDSpan17.7

TDSpan19.4

TDSpan20.6

TDSpan20.0

TDSpan17.7

TDSpan16.5

TDSpan16.5

TDSpan-6.8%

TRTDSpanHuron Perth Public Health

TDSpan44.4

TDSpan47.9

TDSpan45.1

TDSpan43.6

TDSpan55.8

TDSpan60.1

TDSpan59.4

TDSpan+33.8%

TRTDSpanLambton Public Health

TDSpan15.3

TDSpan16.0

TDSpan18.3

TDSpan16.0

TDSpan19.9

TDSpan24.4

TDSpan35.9

TDSpan+134.6%

TRTDSpanMiddlesex-London Health Unit

TDSpan51.4

TDSpan52.4

TDSpan54.0

TDSpan58.1

TDSpan50.8

TDSpan55.0

TDSpan62.3

TDSpan+21.2%

TRTDSpanSouthwestern Public Health

TDSpan49.6

TDSpan56.7

TDSpan65.7

TDSpan64.8

TDSpan73.8

TDSpan79.4

TDSpan79.4

TDSpan+60.1%

TRTDSpanWindsor-Essex County Health Unit

TDSpan145.5

TDSpan149.7

TDSpan173.0

TDSpan172.8

TDSpan188.5

TDSpan211.4

TDSpan241.0

TDSpan+65.6%

Span










Span

TRTDSpanCENTRAL WEST

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TDSpan

TRTDSpanBrant County Health Unit

TDSpan46.4

TDSpan54.8

TDSpan65.1

TDSpan70.9

TDSpan72.2

TDSpan70.9

TDSpan77.3

TDSpan+66.6%

TRTDSpanCity of Hamilton Public Health Services

TDSpan92.5

TDSpan101.3

TDSpan110.6

TDSpan107.1

TDSpan111.5

TDSpan116.7

TDSpan127.7

TDSpan+38.1%

TRTDSpanHaldimand-Norfolk Health Unit

TDSpan46.5

TDSpan46.5

TDSpan46.5

TDSpan48.2

TDSpan45.6

TDSpan44.7

TDSpan41.2

TDSpan-11.4%

TRTDSpanHalton Region Public Health

TDSpan70.4

TDSpan68.3

TDSpan70.7

TDSpan64.6

TDSpan68.2

TDSpan71.7

TDSpan74.1

TDSpan+5.3%

TRTDSpanNiagara Region Public Health

TDSpan55.0

TDSpan60.1

TDSpan63.9

TDSpan68.4

TDSpan74.9

TDSpan76.6

TDSpan79.4

TDSpan+44.4%

TRTDSpanRegion of Waterloo Public Health and Emergency Services

TDSpan78.0

TDSpan77.3

TDSpan81.3

TDSpan79.9

TDSpan84.7

TDSpan87.3

TDSpan86.9

TDSpan+11.4%

TRTDSpanWellington-Dufferin-Guelph Public Health

TDSpan80.5

TDSpan87.5

TDSpan88.8

TDSpan88.5

TDSpan88.2

TDSpan94.6

TDSpan93.9

TDSpan+16.6%

TRTDSpanTOTAL ONTARIO

TDSpan88.9

TDSpan88.1

TDSpan90.0

TDSpan92.5

TDSpan94.9

TDSpan97.6

TDSpan100.5

TDSpan+13.0%

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 December 20, 2020. Toronto, ON: Queen’s Printer for Ontario; 2020. 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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Figure

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