covid-19 in ontario: january 15, 2020 to december 24, 2020 · grey bruce health unit 8 11 430 253.1...

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COVID-19 in Ontario: January 15, 2020 to December 24, 2020 1 Daily Epidemiologic Summary COVID-19 in Ontario: January 15, 2020 to December 24, 2020 This report includes the most current information available from CCM and other case management systems (CCM plus) as of December 24, 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 167,269 confirmed cases of COVID-19 in Ontario reported to date. Compared to the previous day, this represents: An increase of 2,159 confirmed cases (percent change of -11.8%) An increase of 43 deaths (percent change of -12.2%) An increase of 2,237 resolved cases (percent change of +11.1%) 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.

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  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 1

    Daily Epidemiologic Summary

    COVID-19 in Ontario: January 15, 2020 to December 24, 2020

    This report includes the most current information available from CCM and other case management systems (CCM plus) as of December 24, 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 167,269 confirmed cases of COVID-19 in Ontario reported to date.

    Compared to the previous day, this represents:

    An increase of 2,159 confirmed cases (percent change of -11.8%)

    An increase of 43 deaths (percent change of -12.2%)

    An increase of 2,237 resolved cases (percent change of +11.1%)

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 2

    Case Characteristics

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

    Change in cases

    December 23

    Change in cases

    December 24

    Percentage change

    December 24 compared to December 23

    Cumulative case count

    as of December 24

    Total number of cases 2,447 2,159 -11.8% 167,269

    Number of deaths 49 43 -12.2% 4,321

    Number resolved 2,013 2,237 +11.1% 143,260

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 3

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

    Change in cases

    December 23

    Change in cases

    December 24

    Cumulative case count

    as of December 24

    Gender: Male 1,170 1,039 82,019

    Gender: Female 1,244 1,092 84,198

    Ages: 19 and under 310 283 21,542

    Ages: 20-39 869 764 61,109

    Ages: 40-59 723 668 47,997

    Ages: 60-79 394 314 24,023

    Ages: 80 and over 150 128 12,558

    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 24, 2020: Ontario

    Change in cases

    December 23

    Change in cases

    December 24

    Cumulative case count from August 30 to

    December 24

    Ages: 4 to 8 52 53 3,460

    Ages: 9 to 13 83 78 4,800

    Ages: 14 to 17 85 60 4,663

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 4

    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 23

    Change in cases

    December 24

    Cumulative case count as of December 24

    Residents 109 97 10,412

    Health care workers 72 48 4,116

    Deaths among residents 35 22 2,665

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 5

    Time

    Figure 1. Confirmed cases of COVID-19 by likely acquisition and public health unit reported date: Ontario, January 15, 2020 to December 24, 2020

    Data Source: CCM plus

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 6

    Figure 2. Confirmed cases of COVID-19 by likely acquisition and approximation of symptom onset date: Ontario, January 15, 2020 to December 24, 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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 7

    Figure 3. Number of COVID-19 tests completed and percent positivity: Ontario, March 29, 2020 to December 23, 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.

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 8

    Severity Figure 4. Confirmed deaths among COVID-19 cases by date of death: Ontario, March 1, 2020 to December 24, 2020

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

    Data Source: CCM plus

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 9

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

    Blank cell Cumulative case count

    as of December 24 Percentage of all

    cases

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

    4,321 2.6%

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

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

    Deaths reported in ages: 40-59 170 0.4%

    Deaths reported in ages: 60-79 1,144 4.8%

    Deaths reported in ages: 80 and over 2,987 23.8%

    Ever in ICU 1,826 1.1%

    Ever hospitalized 9,189 5.5%

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 10

    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 23

    Change in cases

    December 24

    Cumulative case count

    Cumulative rate per 100,000 population

    Northwestern Health Unit 1 2 148 168.8

    Thunder Bay District Health Unit 20 10 554 369.4

    TOTAL NORTH WEST 21 12 702 295.4

    Algoma Public Health 0 1 64 55.9

    North Bay Parry Sound District Health Unit

    1 4 116 89.4

    Porcupine Health Unit 2 0 127 152.2

    Public Health Sudbury & Districts 5 0 259 130.1

    Timiskaming Health Unit 4 3 51 156.0

    TOTAL NORTH EAST 12 8 617 110.3

    Ottawa Public Health 77 54 9,576 908.0

    Eastern Ontario Health Unit 30 17 1,255 601.3

    Hastings Prince Edward Public Health

    3 2 261 154.9

    Kingston, Frontenac and Lennox & Addington Public Health

    7 7 492 231.3

    Leeds, Grenville & Lanark District Health Unit

    5 5 645 372.5

    Renfrew County and District Health Unit

    1 1 222 204.4

    TOTAL EASTERN 123 86 12,451 646.3

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 11

    Public Health Unit Name Change in

    cases December 23

    Change in cases

    December 24

    Cumulative case count

    Cumulative rate per 100,000 population

    Durham Region Health Department 92 93 6,678 937.4

    Haliburton, Kawartha, Pine Ridge District Health Unit

    8 7 478 253.0

    Peel Public Health 502 385 36,786 2,290.6

    Peterborough Public Health 9 4 289 195.3

    Simcoe Muskoka District Health Unit

    38 51 3,257 543.2

    York Region Public Health 263 213 15,739 1,284.0

    TOTAL CENTRAL EAST 912 753 63,227 1,411.1

    Toronto Public Health 646 616 54,368 1,742.4

    TOTAL TORONTO 646 616 54,368 1,742.4

    Chatham-Kent Public Health 6 9 608 571.9

    Grey Bruce Health Unit 8 11 430 253.1

    Huron Perth Public Health 8 16 583 417.2

    Lambton Public Health 20 2 576 439.8

    Middlesex-London Health Unit 67 44 2,748 541.5

    Southwestern Public Health 30 31 1,074 507.8

    Windsor-Essex County Health Unit 173 135 6,555 1,543.0

    TOTAL SOUTH WEST 312 248 12,574 743.7

    Brant County Health Unit 16 3 872 561.8

    City of Hamilton Public Health Services

    101 77 5,339 901.6

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 12

    Public Health Unit Name Change in

    cases December 23

    Change in cases

    December 24

    Cumulative case count

    Cumulative rate per 100,000 population

    Haldimand-Norfolk Health Unit 11 9 821 719.7

    Halton Region Public Health 55 96 5,139 830.1

    Niagara Region Public Health 93 78 3,401 719.8

    Region of Waterloo Public Health and Emergency Services

    82 105 5,413 926.3

    Wellington-Dufferin-Guelph Public Health

    63 68 2,345 751.8

    TOTAL CENTRAL WEST 421 436 23,330 818.8

    TOTAL ONTARIO 2,447 2,159 167,269 1,125.3

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

    Data Source: CCM plus

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 13

    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 23

    Change in outbreaks

    December 24

    Number of ongoing

    outbreaks

    Cumulative number of outbreaks reported

    Long-term care homes 7 4 174 869

    Retirement homes 4 3 103 451

    Hospitals 2 4 53 229

    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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 14

    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 24, 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 24, 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 24, 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

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 15

    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.

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 16

    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.

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 17

    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 9, 2020 to December 21, 2020

    Public Health Unit Name

    Dec 9 to

    Dec 15

    Dec 10 to

    Dec 16

    Dec 11 to

    Dec 17

    Dec 12 to

    Dec 18

    Dec 13 to

    Dec 19

    Dec 14 to

    Dec 20

    Dec 15 to

    Dec 21

    % change from

    Dec 9-15 to Dec 15-21

    NORTH WEST

    Northwestern Health Unit

    3.4 3.4 3.4 5.7 5.7 5.7 10.3 +202.9%

    Thunder Bay District Health Unit

    36.7 32.0 37.3 40.0 44.7 44.0 48.7 +32.7%

    NORTH EAST

    Algoma Public Health

    0.9 0.9 0.0 0.0 0.0 0.0 0.0 -100.0%

    North Bay Parry Sound District Health Unit

    4.6 9.2 10.8 12.3 12.3 12.3 12.3 +167.4%

    Porcupine Health Unit

    2.4 2.4 3.6 3.6 4.8 3.6 8.4 +250.0%

    Public Health Sudbury & Districts

    3.5 3.5 4.5 4.0 4.0 4.0 5.0 +42.9%

    Timiskaming Health Unit

    12.2 15.3 15.3 27.5 33.7 36.7 45.9 +276.2%

    EASTERN

    Ottawa Public Health

    29.2 30.2 31.0 28.1 27.5 26.9 27.0 -7.5%

    Eastern Ontario Health Unit

    55.1 58.9 55.6 50.8 44.1 40.7 40.7 -26.1%

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 18

    Public Health Unit Name

    Dec 9 to

    Dec 15

    Dec 10 to

    Dec 16

    Dec 11 to

    Dec 17

    Dec 12 to

    Dec 18

    Dec 13 to

    Dec 19

    Dec 14 to

    Dec 20

    Dec 15 to

    Dec 21

    % change from

    Dec 9-15 to Dec 15-21

    Hastings Prince Edward Public Health

    26.1 22.0 14.2 16.0 14.8 16.6 14.8 -43.3%

    Kingston, Frontenac and Lennox & Addington Public Health

    44.2 43.7 40.9 37.6 35.7 35.7 32.4 -26.7%

    Leeds, Grenville & Lanark District Health Unit

    33.5 31.8 26.6 24.8 21.4 20.8 19.6 -41.5%

    Renfrew County and District Health Unit

    29.5 17.5 18.4 15.6 15.6 13.8 16.6 -43.7%

    CENTRAL EAST

    Durham Region Health Department

    83.8 87.5 89.4 92.2 89.1 93.6 97.7 +16.6%

    Haliburton, Kawartha, Pine Ridge District Health Unit

    34.4 30.2 28.1 25.4 24.3 23.8 24.3 -29.4%

    Peel Public Health

    198.1 194.4 194.6 194.7 201.3 208.5 194.9 -1.6%

    Peterborough Public Health

    14.2 15.5 14.9 16.2 15.5 15.5 18.9 +33.1%

    Simcoe Muskoka

    47.0 52.4 55.5 57.0 59.5 60.9 62.4 +32.8%

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 19

    Public Health Unit Name

    Dec 9 to

    Dec 15

    Dec 10 to

    Dec 16

    Dec 11 to

    Dec 17

    Dec 12 to

    Dec 18

    Dec 13 to

    Dec 19

    Dec 14 to

    Dec 20

    Dec 15 to

    Dec 21

    % change from

    Dec 9-15 to Dec 15-21

    District Health Unit

    York Region Public Health

    103.4 101.5 104.1 115.4 120.7 119.4 124.1 +20.0%

    TORONTO

    Toronto Public Health

    135.2 142.2 145.2 148.0 147.1 149.8 144.9 +7.2%

    SOUTH WEST

    Chatham-Kent Public Health

    24.5 25.4 31.0 25.4 32.0 31.0 32.9 +34.3%

    Grey Bruce Health Unit

    17.1 15.9 15.9 15.9 17.7 17.1 18.2 +6.4%

    Huron Perth Public Health

    55.8 60.1 59.4 53.7 51.5 54.4 58.7 +5.2%

    Lambton Public Health

    19.9 24.4 35.9 41.2 55.7 57.3 64.9 +226.1%

    Middlesex-London Health Unit

    50.6 54.8 62.1 70.3 76.3 83.7 89.1 +76.1%

    Southwestern Public Health

    74.2 79.9 80.4 81.3 78.0 77.1 93.6 +26.1%

    Windsor-Essex County Health Unit

    190.2 213.3 242.9 250.2 266.9 273.5 285.1 +49.9%

    CENTRAL WEST

    Brant County Health Unit

    72.2 70.9 77.3 75.4 69.6 59.3 59.3 -17.9%

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 20

    Public Health Unit Name

    Dec 9 to

    Dec 15

    Dec 10 to

    Dec 16

    Dec 11 to

    Dec 17

    Dec 12 to

    Dec 18

    Dec 13 to

    Dec 19

    Dec 14 to

    Dec 20

    Dec 15 to

    Dec 21

    % change from

    Dec 9-15 to Dec 15-21

    City of Hamilton Public Health Services

    110.1 115.3 126.1 127.2 122.1 120.2 123.4 +12.1%

    Haldimand-Norfolk Health Unit

    45.6 44.7 41.2 47.3 60.5 60.5 63.1 +38.4%

    Halton Region Public Health

    68.3 71.9 74.5 77.5 84.0 85.4 86.7 +26.9%

    Niagara Region Public Health

    74.9 76.4 79.2 101.6 107.3 109.6 112.6 +50.3%

    Region of Waterloo Public Health and Emergency Services

    84.7 87.1 87.1 92.2 98.2 98.7 106.1 +25.3%

    Wellington-Dufferin-Guelph Public Health

    89.1 94.9 94.3 100.7 93.3 91.4 95.2 +6.8%

    TOTAL ONTARIO

    94.9 97.7 100.5 103.7 105.6 107.4 107.2 +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.

  • COVID-19 in Ontario: January 15, 2020 to December 24, 2020 21

    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 24, 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 24, 2020 This report includes the most current information available from CCM and other case management systems (CCM plus) as of December 24, 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 There are a total of 167,269 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 167,269 confirmed cases of COVID-19 in Ontario reported to date. There are a total of 167,269 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 2,159 confirmed cases (percent change of -11.8%) An increase of 2,159 confirmed cases (percent change of -11.8%)

    An increase of 43 deaths (percent change of -12.2%) An increase of 43 deaths (percent change of -12.2%)

    An increase of 2,237 resolved cases (percent change of +11.1%) An increase of 2,237 resolved cases (percent change of +11.1%)

    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 23

    THSpanChange in cases December 24

    THSpanPercentage change December 24 compared to December 23

    THSpanCumulative case count as of December 24

    Span

    TRTDSpanTotal number of cases

    TDSpan2,447

    TDSpan2,159

    TDSpan-11.8%

    TDSpan167,269

    TRTDSpanNumber of deaths

    TDSpan49

    TDSpan43

    TDSpan-12.2%

    TDSpan4,321

    TRTDSpanNumber resolved

    TDSpan2,013

    TDSpan2,237

    TDSpan+11.1%

    TDSpan143,260

    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

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count as of December 24

    Span

    TRTDSpanGender: Male

    TDSpan1,170

    TDSpan1,039

    TDSpan82,019

    TRTDSpanGender: Female

    TDSpan1,244

    TDSpan1,092

    TDSpan84,198

    TRTDSpanAges: 19 and under

    TDSpan310

    TDSpan283

    TDSpan21,542

    TRTDSpanAges: 20-39

    TDSpan869

    TDSpan764

    TDSpan61,109

    TRTDSpanAges: 40-59

    TDSpan723

    TDSpan668

    TDSpan47,997

    TRTDSpanAges: 60-79

    TDSpan394

    TDSpan314

    TDSpan24,023

    TRTDSpanAges: 80 and over

    TDSpan150

    TDSpan128

    TDSpan12,558

    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 24, 2020: Ontario TableTRTHSpan

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count from August 30 to December 24

    Span

    TRTDSpanAges: 4 to 8

    TDSpan52

    TDSpan53

    TDSpan3,460

    TRTDSpanAges: 9 to 13

    TDSpan83

    TDSpan78

    TDSpan4,800

    TRTDSpanAges: 14 to 17

    TDSpan85

    TDSpan60

    TDSpan4,663

    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

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count as of December 24

    Span

    TRTDSpanResidents

    TDSpan109

    TDSpan97

    TDSpan10,412

    TRTDSpanHealth care workers

    TDSpan72

    TDSpan48

    TDSpan4,116

    TRTDSpanDeaths among residents

    TDSpan35

    TDSpan22

    TDSpan2,665

    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 24, 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 24, 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 23, 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 24, 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

    THSpanCumulative case count as of December 24

    THSpanPercentage of all cases

    Span

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

    TDSpan4,321

    TDSpan2.6%

    TRTDSpanDeaths reported in ages: 19 and under

    TDSpan1

    TDSpan< 0.1%

    TRTDSpanDeaths reported in ages: 20-39

    TDSpan18

    TDSpan< 0.1%

    TRTDSpanDeaths reported in ages: 40-59

    TDSpan170

    TDSpan0.4%

    TRTDSpanDeaths reported in ages: 60-79

    TDSpan1,144

    TDSpan4.8%

    TRTDSpanDeaths reported in ages: 80 and over

    TDSpan2,987

    TDSpan23.8%

    TRTDSpanEver in ICU

    TDSpan1,826

    TDSpan1.1%

    TRTDSpanEver hospitalized

    TDSpan9,189

    TDSpan5.5%

    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

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count

    THSpanCumulative rate per 100,000 population

    Span

    TRTDSpanNorthwestern Health Unit

    TDSpan1

    TDSpan2

    TDSpan148

    TDSpan168.8

    TRTDSpanThunder Bay District Health Unit

    TDSpan20

    TDSpan10

    TDSpan554

    TDSpan369.4

    TRTDSpanTOTAL NORTH WEST

    TDSpan21

    TDSpan12

    TDSpan702

    TDSpan295.4

    TRTDSpanAlgoma Public Health

    TDSpan0

    TDSpan1

    TDSpan64

    TDSpan55.9

    TRTDSpanNorth Bay Parry Sound District Health Unit

    TDSpan1

    TDSpan4

    TDSpan116

    TDSpan89.4

    TRTDSpanPorcupine Health Unit

    TDSpan2

    TDSpan0

    TDSpan127

    TDSpan152.2

    TRTDSpanPublic Health Sudbury & Districts

    TDSpan5

    TDSpan0

    TDSpan259

    TDSpan130.1

    TRTDSpanTimiskaming Health Unit

    TDSpan4

    TDSpan3

    TDSpan51

    TDSpan156.0

    TRTDSpanTOTAL NORTH EAST

    TDSpan12

    TDSpan8

    TDSpan617

    TDSpan110.3

    TRTDSpanOttawa Public Health

    TDSpan77

    TDSpan54

    TDSpan9,576

    TDSpan908.0

    TRTDSpanEastern Ontario Health Unit

    TDSpan30

    TDSpan17

    TDSpan1,255

    TDSpan601.3

    TRTDSpanHastings Prince Edward Public Health

    TDSpan3

    TDSpan2

    TDSpan261

    TDSpan154.9

    TRTDSpanKingston, Frontenac and Lennox & Addington Public Health

    TDSpan7

    TDSpan7

    TDSpan492

    TDSpan231.3

    TRTDSpanLeeds, Grenville & Lanark District Health Unit

    TDSpan5

    TDSpan5

    TDSpan645

    TDSpan372.5

    TRTDSpanRenfrew County and District Health Unit

    TDSpan1

    TDSpan1

    TDSpan222

    TDSpan204.4

    TRTDSpanTOTAL EASTERN

    TDSpan123

    TDSpan86

    TDSpan12,451

    TDSpan646.3

    Span

    TableTRTHSpanPublic Health Unit Name

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count

    THSpanCumulative rate per 100,000 population

    Span

    TRTDSpanDurham Region Health Department

    TDSpan92

    TDSpan93

    TDSpan6,678

    TDSpan937.4

    TRTDSpanHaliburton, Kawartha, Pine Ridge District Health Unit

    TDSpan8

    TDSpan7

    TDSpan478

    TDSpan253.0

    TRTDSpanPeel Public Health

    TDSpan502

    TDSpan385

    TDSpan36,786

    TDSpan2,290.6

    TRTDSpanPeterborough Public Health

    TDSpan9

    TDSpan4

    TDSpan289

    TDSpan195.3

    TRTDSpanSimcoe Muskoka District Health Unit

    TDSpan38

    TDSpan51

    TDSpan3,257

    TDSpan543.2

    TRTDSpanYork Region Public Health

    TDSpan263

    TDSpan213

    TDSpan15,739

    TDSpan1,284.0

    TRTDSpanTOTAL CENTRAL EAST

    TDSpan912

    TDSpan753

    TDSpan63,227

    TDSpan1,411.1

    TRTDSpanToronto Public Health

    TDSpan646

    TDSpan616

    TDSpan54,368

    TDSpan1,742.4

    TRTDSpanTOTAL TORONTO

    TDSpan646

    TDSpan616

    TDSpan54,368

    TDSpan1,742.4

    TRTDSpanChatham-Kent Public Health

    TDSpan6

    TDSpan9

    TDSpan608

    TDSpan571.9

    TRTDSpanGrey Bruce Health Unit

    TDSpan8

    TDSpan11

    TDSpan430

    TDSpan253.1

    TRTDSpanHuron Perth Public Health

    TDSpan8

    TDSpan16

    TDSpan583

    TDSpan417.2

    TRTDSpanLambton Public Health

    TDSpan20

    TDSpan2

    TDSpan576

    TDSpan439.8

    TRTDSpanMiddlesex-London Health Unit

    TDSpan67

    TDSpan44

    TDSpan2,748

    TDSpan541.5

    TRTDSpanSouthwestern Public Health

    TDSpan30

    TDSpan31

    TDSpan1,074

    TDSpan507.8

    TRTDSpanWindsor-Essex County Health Unit

    TDSpan173

    TDSpan135

    TDSpan6,555

    TDSpan1,543.0

    TRTDSpanTOTAL SOUTH WEST

    TDSpan312

    TDSpan248

    TDSpan12,574

    TDSpan743.7

    TRTDSpanBrant County Health Unit

    TDSpan16

    TDSpan3

    TDSpan872

    TDSpan561.8

    TRTDSpanCity of Hamilton Public Health Services

    TDSpan101

    TDSpan77

    TDSpan5,339

    TDSpan901.6

    Span

    TableTRTHSpanPublic Health Unit Name

    THSpanChange in cases December 23

    THSpanChange in cases December 24

    THSpanCumulative case count

    THSpanCumulative rate per 100,000 population

    Span

    TRTDSpanHaldimand-Norfolk Health Unit

    TDSpan11

    TDSpan9

    TDSpan821

    TDSpan719.7

    TRTDSpanHalton Region Public Health

    TDSpan55

    TDSpan96

    TDSpan5,139

    TDSpan830.1

    TRTDSpanNiagara Region Public Health

    TDSpan93

    TDSpan78

    TDSpan3,401

    TDSpan719.8

    TRTDSpanRegion of Waterloo Public Health and Emergency Services

    TDSpan82

    TDSpan105

    TDSpan5,413

    TDSpan926.3

    TRTDSpanWellington-Dufferin-Guelph Public Health

    TDSpan63

    TDSpan68

    TDSpan2,345

    TDSpan751.8

    TRTDSpanTOTAL CENTRAL WEST

    TDSpan421

    TDSpan436

    TDSpan23,330

    TDSpan818.8

    TRTDSpanTOTAL ONTARIO

    TDSpan2,447

    TDSpan2,159

    TDSpan167,269

    TDSpan1,125.3

    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 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 23

    THSpanChange in outbreaks December 24

    THSpanNumber of ongoing outbreaks

    THSpanCumulative number of outbreaks reported

    Span

    TRTDSpanLong-term care homes

    TDSpan7

    TDSpan4

    TDSpan174

    TDSpan869

    TRTDSpanRetirement homes

    TDSpan4

    TDSpan3

    TDSpan103

    TDSpan451

    TRTDSpanHospitals

    TDSpan2

    TDSpan4

    TDSpan53

    TDSpan229

    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 December 24, 2020 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 December 24, 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 24, 2020 at 2 p.m. Information successfully uploaded to the Ministry from Local Systems: Toronto Public Health (Coronavirus Rapid Entry System) CORES as of December 24, 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 24, 2020 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 December 24, 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. 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 9, 2020 to December 21, 2020 TableTRTHSpanPublic Health Unit Name

    THSpanDec 9 to Dec 15

    THSpanDec 10 to Dec 16

    THSpanDec 11 to Dec 17

    THSpanDec 12 to Dec 18

    THSpanDec 13 to Dec 19

    THSpanDec 14 to Dec 20

    THSpanDec 15 to Dec 21

    THSpan% change from Dec 9-15 to Dec 15-21

    Span

    TRTDSpanNORTH WEST

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanNorthwestern Health Unit

    TDSpan3.4

    TDSpan3.4

    TDSpan3.4

    TDSpan5.7

    TDSpan5.7

    TDSpan5.7

    TDSpan10.3

    TDSpan+202.9%

    TRTDSpanThunder Bay District Health Unit

    TDSpan36.7

    TDSpan32.0

    TDSpan37.3

    TDSpan40.0

    TDSpan44.7

    TDSpan44.0

    TDSpan48.7

    TDSpan+32.7%

    TRTDSpanNORTH EAST

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanAlgoma Public Health

    TDSpan0.9

    TDSpan0.9

    TDSpan0.0

    TDSpan0.0

    TDSpan0.0

    TDSpan0.0

    TDSpan0.0

    TDSpan-100.0%

    TRTDSpanNorth Bay Parry Sound District Health Unit

    TDSpan4.6

    TDSpan9.2

    TDSpan10.8

    TDSpan12.3

    TDSpan12.3

    TDSpan12.3

    TDSpan12.3

    TDSpan+167.4%

    TRTDSpanPorcupine Health Unit

    TDSpan2.4

    TDSpan2.4

    TDSpan3.6

    TDSpan3.6

    TDSpan4.8

    TDSpan3.6

    TDSpan8.4

    TDSpan+250.0%

    TRTDSpanPublic Health Sudbury & Districts

    TDSpan3.5

    TDSpan3.5

    TDSpan4.5

    TDSpan4.0

    TDSpan4.0

    TDSpan4.0

    TDSpan5.0

    TDSpan+42.9%

    TRTDSpanTimiskaming Health Unit

    TDSpan12.2

    TDSpan15.3

    TDSpan15.3

    TDSpan27.5

    TDSpan33.7

    TDSpan36.7

    TDSpan45.9

    TDSpan+276.2%

    TRTDSpanEASTERN

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanOttawa Public Health

    TDSpan29.2

    TDSpan30.2

    TDSpan31.0

    TDSpan28.1

    TDSpan27.5

    TDSpan26.9

    TDSpan27.0

    TDSpan-7.5%

    TRTDSpanEastern Ontario Health Unit

    TDSpan55.1

    TDSpan58.9

    TDSpan55.6

    TDSpan50.8

    TDSpan44.1

    TDSpan40.7

    TDSpan40.7

    TDSpan-26.1%

    Span

    TableTRTHSpanPublic Health Unit Name

    THSpanDec 9 to Dec 15

    THSpanDec 10 to Dec 16

    THSpanDec 11 to Dec 17

    THSpanDec 12 to Dec 18

    THSpanDec 13 to Dec 19

    THSpanDec 14 to Dec 20

    THSpanDec 15 to Dec 21

    THSpan% change from Dec 9-15 to Dec 15-21

    Span

    TRTDSpanHastings Prince Edward Public Health

    TDSpan26.1

    TDSpan22.0

    TDSpan14.2

    TDSpan16.0

    TDSpan14.8

    TDSpan16.6

    TDSpan14.8

    TDSpan-43.3%

    TRTDSpanKingston, Frontenac and Lennox & Addington Public Health

    TDSpan44.2

    TDSpan43.7

    TDSpan40.9

    TDSpan37.6

    TDSpan35.7

    TDSpan35.7

    TDSpan32.4

    TDSpan-26.7%

    TRTDSpanLeeds, Grenville & Lanark District Health Unit

    TDSpan33.5

    TDSpan31.8

    TDSpan26.6

    TDSpan24.8

    TDSpan21.4

    TDSpan20.8

    TDSpan19.6

    TDSpan-41.5%

    TRTDSpanRenfrew County and District Health Unit

    TDSpan29.5

    TDSpan17.5

    TDSpan18.4

    TDSpan15.6

    TDSpan15.6

    TDSpan13.8

    TDSpan16.6

    TDSpan-43.7%

    TRTDSpanCENTRAL EAST

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanDurham Region Health Department

    TDSpan83.8

    TDSpan87.5

    TDSpan89.4

    TDSpan92.2

    TDSpan89.1

    TDSpan93.6

    TDSpan97.7

    TDSpan+16.6%

    TRTDSpanHaliburton, Kawartha, Pine Ridge District Health Unit

    TDSpan34.4

    TDSpan30.2

    TDSpan28.1

    TDSpan25.4

    TDSpan24.3

    TDSpan23.8

    TDSpan24.3

    TDSpan-29.4%

    TRTDSpanPeel Public Health

    TDSpan198.1

    TDSpan194.4

    TDSpan194.6

    TDSpan194.7

    TDSpan201.3

    TDSpan208.5

    TDSpan194.9

    TDSpan-1.6%

    TRTDSpanPeterborough Public Health

    TDSpan14.2

    TDSpan15.5

    TDSpan14.9

    TDSpan16.2

    TDSpan15.5

    TDSpan15.5

    TDSpan18.9

    TDSpan+33.1%

    TRTDSpanSimcoe Muskoka

    TDSpan47.0

    TDSpan52.4

    TDSpan55.5

    TDSpan57.0

    TDSpan59.5

    TDSpan60.9

    TDSpan62.4

    TDSpan+32.8%

    Span

    TableTRTHSpanPublic Health Unit Name

    THSpanDec 9 to Dec 15

    THSpanDec 10 to Dec 16

    THSpanDec 11 to Dec 17

    THSpanDec 12 to Dec 18

    THSpanDec 13 to Dec 19

    THSpanDec 14 to Dec 20

    THSpanDec 15 to Dec 21

    THSpan% change from Dec 9-15 to Dec 15-21

    Span

    TRTDSpanDistrict Health Unit

    TDTDTDTDTDTDTDTD

    TRTDSpanYork Region Public Health

    TDSpan103.4

    TDSpan101.5

    TDSpan104.1

    TDSpan115.4

    TDSpan120.7

    TDSpan119.4

    TDSpan124.1

    TDSpan+20.0%

    TRTDSpanTORONTO

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanToronto Public Health

    TDSpan135.2

    TDSpan142.2

    TDSpan145.2

    TDSpan148.0

    TDSpan147.1

    TDSpan149.8

    TDSpan144.9

    TDSpan+7.2%

    TRTDSpanSOUTH WEST

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanChatham-Kent Public Health

    TDSpan24.5

    TDSpan25.4

    TDSpan31.0

    TDSpan25.4

    TDSpan32.0

    TDSpan31.0

    TDSpan32.9

    TDSpan+34.3%

    TRTDSpanGrey Bruce Health Unit

    TDSpan17.1

    TDSpan15.9

    TDSpan15.9

    TDSpan15.9

    TDSpan17.7

    TDSpan17.1

    TDSpan18.2

    TDSpan+6.4%

    TRTDSpanHuron Perth Public Health

    TDSpan55.8

    TDSpan60.1

    TDSpan59.4

    TDSpan53.7

    TDSpan51.5

    TDSpan54.4

    TDSpan58.7

    TDSpan+5.2%

    TRTDSpanLambton Public Health

    TDSpan19.9

    TDSpan24.4

    TDSpan35.9

    TDSpan41.2

    TDSpan55.7

    TDSpan57.3

    TDSpan64.9

    TDSpan+226.1%

    TRTDSpanMiddlesex-London Health Unit

    TDSpan50.6

    TDSpan54.8

    TDSpan62.1

    TDSpan70.3

    TDSpan76.3

    TDSpan83.7

    TDSpan89.1

    TDSpan+76.1%

    TRTDSpanSouthwestern Public Health

    TDSpan74.2

    TDSpan79.9

    TDSpan80.4

    TDSpan81.3

    TDSpan78.0

    TDSpan77.1

    TDSpan93.6

    TDSpan+26.1%

    TRTDSpanWindsor-Essex County Health Unit

    TDSpan190.2

    TDSpan213.3

    TDSpan242.9

    TDSpan250.2

    TDSpan266.9

    TDSpan273.5

    TDSpan285.1

    TDSpan+49.9%

    TRTDSpanCENTRAL WEST

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TDSpan

    TRTDSpanBrant County Health Unit

    TDSpan72.2

    TDSpan70.9

    TDSpan77.3

    TDSpan75.4

    TDSpan69.6

    TDSpan59.3

    TDSpan59.3

    TDSpan-17.9%

    Span

    TableTRTHSpanPublic Health Unit Name

    THSpanDec 9 to Dec 15

    THSpanDec 10 to Dec 16

    THSpanDec 11 to Dec 17

    THSpanDec 12 to Dec 18

    THSpanDec 13 to Dec 19

    THSpanDec 14 to Dec 20

    THSpanDec 15 to Dec 21

    THSpan% change from Dec 9-15 to Dec 15-21

    Span

    TRTDSpanCity of Hamilton Public Health Services

    TDSpan110.1

    TDSpan115.3

    TDSpan126.1

    TDSpan127.2

    TDSpan122.1

    TDSpan120.2

    TDSpan123.4

    TDSpan+12.1%

    TRTDSpanHaldimand-Norfolk Health Unit

    TDSpan45.6

    TDSpan44.7

    TDSpan41.2

    TDSpan47.3

    TDSpan60.5

    TDSpan60.5

    TDSpan63.1

    TDSpan+38.4%

    TRTDSpanHalton Region Public Health

    TDSpan68.3

    TDSpan71.9

    TDSpan74.5

    TDSpan77.5

    TDSpan84.0

    TDSpan85.4

    TDSpan86.7

    TDSpan+26.9%

    TRTDSpanNiagara Region Public Health

    TDSpan74.9

    TDSpan76.4

    TDSpan79.2

    TDSpan101.6

    TDSpan107.3

    TDSpan109.6

    TDSpan112.6

    TDSpan+50.3%

    TRTDSpanRegion of Waterloo Public Health and Emergency Services

    TDSpan84.7

    TDSpan87.1

    TDSpan87.1

    TDSpan92.2

    TDSpan98.2

    TDSpan98.7

    TDSpan106.1

    TDSpan+25.3%

    TRTDSpanWellington-Dufferin-Guelph Public Health

    TDSpan89.1

    TDSpan94.9

    TDSpan94.3

    TDSpan100.7

    TDSpan93.3

    TDSpan91.4

    TDSpan95.2

    TDSpan+6.8%

    TRTDSpanTOTAL ONTARIO

    TDSpan94.9

    TDSpan97.7

    TDSpan100.5

    TDSpan103.7

    TDSpan105.6

    TDSpan107.4

    TDSpan107.2

    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 24, 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