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York Region COVID-19 Guidance
An online repository of guidance documents relevant to COVID-19 for use of York Region Public Health
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CANADIAN
Public Health Agency of Canada
Emerging Evidence on COVID-19: Living Summary of SARS-CoV-2 Variants of Concern: The Delta variant (B.1.617.2) profile-Highlights up to June 30, 2021 [PHAC Jun ]
Emerging Evidence on COVID-19 Living Profile of SARS-CoV-2 Omicron (B.1.1.529) Variant of Concern Highlights up to December 13, 2021
Public Health Agency of Canada Omicron Monitoring Report [Report 9 Feb 11 2022]
Public Health Agency of Canada Omicron Monitoring Report [Report 10 Feb 17 2022]
Public Health Agency of Canada Omicron Monitoring Report [Report 11 Feb 24 2022]
Government of Canada introduces new measures to address COVID-19 Omicron variant of concern [Nov 26 2021]
Remarks from the Chief Public Health Officer on November 26, 2021
Ministry of Health
COVID-19 Hospitalizations, ICU Admissions and Deaths Associated with the New Variants of Concern [Ontario Science Table. Mar 29, 2021]
Public Health Ontario
AT A GLANCE Mechanisms for Increased Transmission of SARS-CoV-2 Variants of Concern [Jun 30 2021]
AT A GLANCE Companion Guide to Variants of Concern (VOCs) [April 2021]
ENHANCED EPIDEMIOLOGICAL SUMMARY Early Dynamics of Omicron in Ontario, November 1 to December 23, 2021 [Jan 1 2022]
ENHANCED EPIDEMIOLOGICAL SUMMARY Early Estimates of Omicron Severity in Ontario based on a Matched Cohort Study, November 22 to December 24, 2021 [Dec 2021]
ENVIRONMENTAL SCAN- Lockdown Duration and Re-opening including Considerations for COVID-19 Variants of Concern [Jan 29, 2021]
Public Health Measures Implemented to Manage the Spread of COVID-19 Variants of Concern (VOC) [May 14th, 2021]
ENVIRONMENTAL SCAN: Type of Mask Required or Recommended for the Public to Control Transmission of SARS-CoV-2 with Consideration of Variants of Concern: Rapid Environmental Scan [Feb 18, 2021]
EVIDENCE BRIEF COVID-19 C.1.2 Lineage: Risk Analysis and Implications for Practice [Sep 1, 2021]
EVIDENCE BRIEF COVID-19 Delta: Risk Assessment and Implications for Practice (September 20, 2021 Update) [PHO Sep 24 2021]
EVIDENCE BRIEF COVID-19 Delta sublineage AY.4.2: Risk Analysis and Implications for Practice [Nov 5 2021]
EVIDENCE BRIEF COVID-19 Gamma Variant: Risk Analysis and Implications for Practice [Jul 22 2021]
EVIDENCE BRIEF SARS-CoV-2 Omicron Variant Sub-Lineages BA.4 and BA.5: Evidence and Risk Assessment [Jul 8 2022]
EVIDENCE BRIEF SARS-CoV-2 Omicron Variant BA.2 and Sublineages of BA.2: Evidence and Risk Assessment (up to date as of June 14, 2022) [Jun 17 2022]
EVIDENCE BRIEF Risk Assessment for Omicron BA.5 and BA.5 Sub-Lineages (as of July 26, 2022)
EVIDENCE BRIEF COVID-19 Omicron Variant Recombinant Lineage: XE [April 2022]
EVIDENCE BRIEF SARS-CoV-2 Omicron Variant Sub-Lineage BA.3 [April 2022]
EVIDENCE BRIEF SARS-CoV-2 Omicron Variant Sub-Lineage BA.2.75 [Jul 2022]
EVIDENCE BRIEF SARS-CoV-2 Omicron Variant and Community Masking [Dec 15 2021]
EVIDENCE BRIEF Evidence on Public Health Measures Required for Rapid Control of Variants of Concern [Feb 16, 2021]
EVIDENCE BRIEF Using COVID-19 Data to Inform Reopening Decision-making in the Context of Variants of Concern [Feb 16, 2021]
FACT SHEET Comparing SARS-CoV-2 Variants of Concern (VOCs)* as of March 31, 2021
FOCUS ON Mitigating Risk of Breakthrough Transmission from Delta Variant [Aug 2021]
FOCUS ON Omicron in Ontario: Risk Analysis for Approaching Public Health Measures in Winter 2022 [Jan 31 2022]
Public Health Measures Implemented to Manage the Spread of COVID-19 Variants of Concern (VOC) [May 14, 2021]
Review of “Hospital admission and emergency care attendance risk for SARS-CoV-2 Delta (B.1.617.2) compared with Alpha (B.1.1.7) variants of concern: a cohort study” [Sep 7 2021]
SARS-CoV-2 (COVID-19 Virus) Variant of Concern (VoC) S Screening and Genomic Sequencing for Surveillance:
SARS-CoV-2 Variants of Concern: Results of Point Prevalence Study [Feb 12, 2021]
SYNTHESIS Omicron Disease Severity – What We Know So Far [Mar 2022]
Science Briefs Use of Rapid Antigen Tests during the Omicron Wave [Science Table Feb 10 2022]
SYNTHESIS- COVID-19 B.1.351 (501Y.V2) Variant of Concern – What We Know So Far [Feb 7, 2021]
Synthesis: COVID-19 B.1.617 Variant of Concern – What We Know So Far [May 26 2021]
SYNTHESIS COVID-19 Omicron (B.1.1.529) Variant of Concern and Communicability…What We Know So Far [Jan 17 2022]
Other
Ask Ontario’s Science Table: Omicron Edition [Science Table, Dec 23 2021]
Modelling the potential consequences of the Omicron SARS-CoV-2 variant in England [London School of Hygiene & Tropical Medicine. last updated Dec 11 2021]
Public Health Implications of SARS-CoV-2 VOC [COVID-END Jul 29 2021]
Rapid Review Report: What is the epidemiology of variants and what are the implications for health care? [Saskatchewan Health Authority Aug 27 2021]
Region of Waterloo: Experience and Lessons Learned From Delta Variant [Region of Waterloo, Aug 10 2021]
What is the efficacy and effectiveness of available COVID-19 vaccines for variants of concern? [COVID-END V 19 Sep 2021]
What is the epidemiology of variants and what are the implications for healthcare [SHA COVID-19 Evidence Support Team Aug 27 2021]
What is the epidemiology of the Omicron variant and its impact on health care? [Saskatchewan Health Authority Dec 22 2021]
INTERNATIONAL
Centers for Disease Control and Prevention (CDC)
Investigation of a SARS-CoV-2 B.1.1.529 (Omicron) Variant Cluster — Nebraska, November–December 2021 [MMWR Dec 31 2021]
SARS-CoV-2 B.1.1.529 (Omicron) Variant — United States, December 1–8, 2021 [MMWR Dec 17 2021]
SARS-CoV-2 Viral Mutations: Impact on COVID-19 Tests [FDA Dec 22 2021]
European Centre for Disease Control (ECDC)
Assessment of the further emergence and potential impact of the SARS-CoV-2 Omicron variant of concern in the context of ongoing transmission of the Delta variant of concern in the EU/EEA, 18th update [Dec 15 2021]
CDTR: Week 47, 21-27 November 2021 [ECDC Nov 26 2021]
Epidemiological update: Omicron variant of concern (VOC) – data as of 16 December 2021 (12:00)
Implications of the emergence and spread of the SARS-CoV-2 variants of concern BA.4 and BA.5 for the EU/EEA [Jun 13 2022]
Methods for the detection and characterisation of SARS-CoV-2 variants – first update [Dec 20 2021]
Technical guidance for antigenic SARS-CoV-2 monitoring [Jun 7 2022]
Threat assessment brief: Implications of the emergence and spread of the SARS-CoV-2 B.1.1. 529 variant of concern (Omicron) for the EU/EEA [ECDC Nov 26 2021]
Methods for the detection and identification of SARS-CoV-2 variants [Mar 2021]
World Health Organization
Classification of Omicron (B.1.1.529): SARS-CoV-2 Variant of Concern [Nov 26 2021]
Enhancing response to Omicron SARS-CoV-2 variant [Jan 21 2022]
Variant analysis of SARS-CoV-2 genomes
Other
Africa Centres for Disease Control and Prevention’s Statement regarding the new SARS-COV-2 virus variant B.1.1.529 [Africa CDC Nov 26 2021]
15 December 2021 Risk assessment for SARS-CoV-2 variant: Omicron VOC-21NOV-01 (B.1.1.529) [UK Health Security Agency]
FREQUENTLY ASKED QUESTIONS FOR THE B.1.1.529 MUTATED SARS-COV-2 LINEAGE IN SOUTH AFRICA [National Institute for Communicable Diseases Nov 26 2021]
Guidance SARS-CoV-2 variants of public health interest: 26 November 2021 [PHE Nov 26 2021]
In Brief: Omicron [NSW Government Updated Dec 24 2021]
In brief Omicron – symptoms and hospitalised patients [NSW Government Jan 21 2022]
Report 48: The value of vaccine booster doses to mitigate the global impact of the Omicron SARS-CoV-2 variant [Imperial College COVID-19 Response Team Dec 16 2021]
Report 49 - Growth, population distribution and immune escape of Omicron in England [MRC Centre for Global Infectious Disease Analysis Dec 16 2021]
Report 50: Hospitalisation risk for Omicron cases in England [Imperial College COVID-19 response team Dec 22 2021]
SARS-CoV-2 Variants [IDSA 2021]
SARS-CoV-2 variants of concern and variants under investigation in England Technical briefing 43 [Jun 24 2022]
Study: Characteristics of SARS-CoV-2 Infections in Israeli Children During the Circulation of Different SARS-CoV-2 Variants [JAMA Public Health Sep 2021]
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