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Alert
Important Note:
In alignment with the Ministry of Health’s updated guidance on testing and case and contact management, which no longer requires public health units to conduct individual level case management, some of PHO’s data in various surveillance reports may no longer be available or may be under reported.
COVID-19 Data and Surveillance
Data and surveillance play a vital role in managing a pandemic. The data that is collected can tell us how the pandemic is evolving, assess severity and risk and develop the necessary interventions to prevent further spread.
Since the onset of COVID-19, PHO has worked closely with the Ministry of Health and our local public health partners to collect, interpret and share COVID-19 data.
Featured
Interactive Report
Ontario COVID-19 Data Tool
Explore confirmed COVID-19 data in Ontario by: case trends over time including hospitalizations and deaths, age and sex, public health unit, reproduction number, acquisition, outbreaks, laboratory testing and vaccines.
Interactive Report
Phylogenetic Analysis of SARS-CoV-2 in Ontario
This interactive tool explores the evolution and spread of SARS-CoV-2 using genomic data produced and analyzed at Public Health Ontario. The tool is intended for genomics researchers and experts, epidemiologists, virologists and public health experts.
Surveillance Report
Genomic Surveillance of Emerging SARS-CoV-2 Variant, BA.2.20, in Ontario
Recorded cases of SARS-CoV-2 Variant, BA.2.20, in Ontario from February 1st to April 20th. Data organized by: total cases, date, sex and age group, geography, border testing, severity, and vaccination status.
Surveillance Report
SARS-CoV-2 Whole Genome Sequencing in Ontario, May 24, 2022
This report summarizes the results of SARS-CoV-2 whole genome sequencing, including variants of concern (VOC) and variants of interest (VOI), conducted by the Ontario COVID-19 Genomics Network.
Routine Surveillance Reports
Surveillance Report
COVID-19 Daily Epidemiological Summary
This daily report provides an epidemiological summary of COVID-19 activity in Ontario to date.
Surveillance Report
COVID-19 in Ontario: Weekly Epidemiological Summary
This weekly report provides an epidemiological summary of weekly COVID-19 activity in Ontario over time.
Surveillance Report
COVID-19 Cases with Severe Outcomes: December 12, 2021 to May 14, 2022
A descriptive analysis characterizing confirmed COVID-19 cases who were hospitalized or in the ICU because of COVID-19 or who died, as reported in CCM.
Summary Report
The Impact of COVID-19 Booster Vaccination on Hospitalizations during the Omicron period: December 15, 2021 to March 13, 2022
The report describes the direct impacts of COVID-19 booster vaccinations on hospitalizations in Ontario.
Summary Report
COVID-19 cases with Lineage B.1.1.529 (Omicron) or S-Gene Target Failure (SGTF) in Ontario: October 31, 2021 to December 29, 2021
Describes implications for mask recommendations in community settings in light of the Omicron VOC, based on available evidence, a precautionary approach and policies implemented in other jurisdictions.
Surveillance Report
COVID-19 in Long-Term Care Homes: Focus on April 24, 2022 to May 7, 2022
A summary of confirmed COVID-19 cases and outbreaks in long-term care homes in Ontario.
Surveillance Report
COVID-19 Regional Incidence and Time to Case Notification in Ontario
This report provides a summary of the case counts of COVID-19, likely source of acquisition, and the timeliness of testing and investigation in Ontario with breakdowns by health region and public health unit.
Summary Report
COVID-19 in Children, Education and Child Care Settings: Focus on December 26, 2021 to January 8, 2022
This bi-weekly report provides an epidemiological summary with a focus on COVID-19 cases in Ontario children and confirmed outbreaks in education settings over time.
Surveillance Report
COVID-19 Vaccine Uptake in Ontario: December 14, 2020 to May 23, 2022
Find a description of vaccine uptake and immunization coverage over time, as well as by priority population, age and gender and public health unit.
Surveillance Report
Adverse Events Following Immunization (AEFIs) for COVID-19 in Ontario: December 13, 2020 to May 22, 2022
This weekly report provides a summary of adverse events following immunization (AEFIs) for COVID-19 vaccines in Ontario reported to date.
Surveillance Report
Archive of COVID-19 Weekly Epidemiological Summaries
An archived collection of weekly reports that provided an epidemiological summary of COVID-19 activity in Ontario.
Surveillance Report
Trends of COVID-19 Incidence in Ontario
The number of COVID-19 confirmed cases in Ontario is summarized on epidemic curves by region, age group, and gender. The reproduction number and doubling time by region is also provided.
Surveillance Report
Confirmed Cases of COVID-19 Following Vaccination in Ontario: December 14, 2020 to May 8, 2022
This report describes confirmed cases of COVID-19 infection following COVID-19 vaccination.
Summary Report
Confirmed Cases of COVID-19 Following Vaccination in Long-Term Care Homes & Retirement Homes in Ontario: December 14, 2020 to June 30, 2021
This report provides a focused analysis of confirmed COVID-19 cases among vaccinated long-term care home and retirement home health care workers and residents in Ontario.
COVID-19
COVID-19 cases with Lineage B.1.1.529 (Omicron) or S-Gene Target Failure (SGTF) in Ontario: October 31, 2021 to December 21, 2021
Describes implications for mask recommendations in community settings in light of the Omicron VOC, based on available evidence, a precautionary approach and policies implemented in other jurisdictions.
COVID-19
COVID-19 cases with Lineage B.1.1.529 (Omicron) or S-Gene Target Failure (SGTF) in Ontario: October 31, 2021 to December 11, 2021
Describes implications for mask recommendations in community settings in light of the Omicron VOC, based on available evidence, a precautionary approach and policies implemented in other jurisdictions.
Summary Report
PHO’s COVID-19 Serosurveillance Initiative
PHO is using serosurveillance to better understand what proportion of the Ontario population has COVID-19 antibodies and to identify hot spots and high risk groups.
Enhanced Epidemiological Summaries
Surveillance Report
Quick Epi Summary: Hospitalizations and Deaths Among COVID-19 Cases in Ontario by Age: Waves 1, 2, 3 and 4
This epidemiological summary is the second in a series presenting information on COVID-19 cases with a focus on outcomes resulting in hospitalization or death. It examines differences between waves 1, 2, 3 and 4, as well as by age groups.
Surveillance Report
Cycle Threshold Values of S-Gene Target Failure COVID-19 Cases in Ontario: December 6 to December 30, 2021
This report provides information on cycle threshold (Ct) values stratified by vaccination status of S-gene target failure (SGTF) COVID-19 cases detected by Public Health Ontario (PHO) laboratory.
Surveillance Report
Neighbourhood COVID-19 Incidence and Vaccination Rates, October 17, 2021 to December 4, 2021
This report describes the relationship between COVID-19 incidence and vaccination rates across Ontario neighbourhoods.
Summary Report
School Outbreak-Associated COVID-19 Cases in Ontario by Vaccination Status and Vaccination Age-Eligibility: July 4, 2021 to November 6, 2021
This brief report summarizes information on COVID-19 cases associated with school outbreaks, with a focus on vaccination age-eligibility and vaccination status from July 4 to November 6, 2021.
Summary Report
Early Dynamics of Omicron in Ontario, November 1 to December 23, 2021
This report estimates the prevalence of Omicron (B.1.1.529) in Ontario, and examines the growth rate of Omicron relative to Delta.
Summary Report
Early Estimates of Omicron Severity in Ontario based on a Matched Cohort Study, November 22 to December 24, 2021
Surveillance Report
Quick Epi Summary: Hospitalizations and Deaths Among COVID-19 Cases in Ontario by Age: Waves 1, 2, 3, 4 and 5
This epidemiological summary is part of a series presenting information on COVID-19 cases with a focus on outcomes resulting in hospitalization or death. It examines differences between waves 1, 2, 3, 4 and 5 as well as by age groups.
Surveillance Report
COVID-19 Outbreaks and Cases in Ontario, by Setting: February 16, 2020 to June 12, 2021
An epidemiologic summary of cumulative confirmed COVID-19 outbreaks and outbreak-associated cases in Ontario by setting, from February 16, 2020 to June 12, 2021.
Surveillance Report
Quick Epi Summary: Hospitalizations and Deaths Among COVID-19 Cases in Ontario: Waves 1, 2 and 3 and 4
This quick epidemiological summary presents information on COVID-19 cases with a focus on outcomes resulting in hospitalization or death. It examines differences between waves 1, 2, 3 and 4 over time, as well as, by age groups.
Surveillance Report
SARS-CoV-2 Whole Genome Sequencing in Ontario, May 24, 2022
This report summarizes the results of SARS-CoV-2 whole genome sequencing, including variants of concern (VOC) and variants of interest (VOI), conducted by the Ontario COVID-19 Genomics Network.
Surveillance Report
COVID-19 Outbreaks in Congregate Living Settings: February 26, 2020 to July 16, 2021
A summary of confirmed COVID-19 cases and outbreaks reported in congregate living settings (group homes/supportive housing, shelters, correctional facilities, short-term accommodation and other congregate settings) in Ontario.
Surveillance Report
Estimating the Prevalence and Growth of SARS-CoV-2 Variants in Ontario using Mutation Profiles
This report includes estimates of the incidence, prevalence, and growth of SARS-CoV-2 variants in Ontario based on mutation profiles (N501Y and E484K).
Surveillance Report
COVID-19 Vaccination Coverage in Ontario by Neighbourhood Diversity and Material Deprivation: December 14, 2020 to February 21, 2022
This report uses the Ontario Marginalization Index to explore trends in health-equity among people aged 18 years or older who have received at least one dose of the COVID-19 vaccine in Ontario.
Surveillance Report
COVID-19 in Ontario: A Summary of Wave 1 Transmission Patterns and Case Identification
A focused analysis of transmission patterns, testing strategy, case detection and severe outcomes of COVID-19 cases in Ontario. We review changes over time within the context of key public health measures.
Surveillance Report
COVID-19 Infection in Children: January 15, 2020 to June 30, 2021
This report provides a focused analysis of laboratory-confirmed COVID-19 cases in children reported in Ontario, as per the Ministry of Health’s case definition.
Surveillance Report
COVID-19 in Health Care Workers in Ontario
An analysis of COVID-19 case characteristics among health care workers including trends, geography and severity.
Surveillance Report
COVID-19 in Ontario: Elementary and Secondary School Outbreaks and Related Cases, August 30, 2020 to April 24, 2021
This report provides a focused analysis on confirmed outbreaks in elementary and secondary schools in Ontario from August 30, 2020 to March 13, 2021, as well as cases associated with these outbreaks.
Surveillance Report
COVID-19 in Ontario – A Focus on Material Deprivation
This report combines individual case data with neighbourhood-level data on socio-economic status to assess how COVID-19 impacts Ontario neighbourhoods differently.
Surveillance Report
Evolution of COVID-19 Case Growth in Ontario
Surveillance Report
COVID-19 Cases with Severe Outcomes: December 12, 2021 to April 23, 2022
A descriptive analysis characterizing confirmed COVID-19 cases who were hospitalized or in the ICU because of COVID-19 or who died, as reported in CCM.
Surveillance Report
COVID-19 Case Fatality, Case Identification, and Attack Rates in Ontario
This report provides estimates of the proportion of infections that are identified as cases in Ontario by age group, up to May 17, 2020.
Surveillance Report
COVID-19 Variants of Concern in Ontario: December 1, 2020 to May 9, 2021
Descriptive summary of COVID-19 variant of concern cases circulating in Ontario.
Surveillance Report
COVID-19 in Ontario – A Focus on Neighbourhood Diversity, February 26, 2020 to December 13, 2021
This report provides an epidemiological summary of COVID-19 cases in Ontario with a focus on neighbourhood material deprivation.
Surveillance Report
COVID-19 in Long-Term Care Homes in Ontario: January 15, 2020 to February 28, 2021
This report provides a focused analysis of confirmed COVID-19 cases and outbreaks reported among long-term care home (LTCH) residents and health care workers (HCW) in Ontario.
Surveillance Report
Reports of events managed as anaphylaxis following COVID-19 vaccines in Ontario: December 13, 2020 to March 6, 2021
This report provides a summary of confirmed adverse events following immunization (AEFIs) managed as anaphylaxis that occurred following a COVID-19 vaccines in Ontario.
PHO Rounds: Gaming and Pandemics: Agile analysis in a time of crisis
This presentation shows how the flexible and dynamic application of red-teaming and gaming techniques can deliver impactful results.
Related Information
External Resources
- COVID-19 case data: All Ontario - Government of Ontario
- COVID-19 cases in schools and child care centres - Ministry of Education
- COVID-19 Hospitalizations - Government of Ontario
- COVID-19 Vaccines Status - Government of Ontario

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