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We have resources on dozens of important environmental health topics presented in various forms including Evidence Reviews, Evidence Briefs and Research Scans, Subject Guides, Blogs, Webinar Recordings, and Videos and Tools. Please see this page for more information concerning these document types. Browse the topics and discover what is available.
Do-it-yourself (DIY) air cleaners: Evidence on effectiveness and considerations for safe operation
January 18, 2023
Key Messages A review of academic and technical literature showed that do-it-yourself (DIY) air cleaners performed similarly to commercial portable air cleaners in terms of clean air…
Pandemic experiences with manual ventilation and carbon dioxide (CO2) sensing in schools
October 19, 2022
Key Messages Schools employed a variety of different manual ventilation protocols to increase air exchange in naturally and mechanically ventilated buildings or classrooms during the…
Canadian green spaces during COVID-19: Public health benefits and planning for resilience
March 16, 2022
Key Messages Canadian green spaces saw marked changes in visitation during the first months of the COVID-19 pandemic. These included city parks and provincial and national parks, as well as informal…
Understanding transmission of SARS-CoV-2 in the ongoing COVID-19 pandemic
December 15, 2021
Introduction The emergence of a novel coronavirus in late 2019, identified as SARS-CoV-2, has resulted in a global pandemic accompanied by an unprecedented public health response. This review of the…
A rapid review of the use of physical barriers in non-clinical settings and COVID-19 transmission
November 17, 2021
Key Messages Epidemiological and experimental evidence suggests that physical barriers may decrease transmission risk. However, challenges in creating clear guidance around barrier design and…
Masking during the COVID-19 pandemic – An update of the evidence
May 20, 2021
Introduction Extensive debate over when, where, and what types of masks should be worn, and by whom, has persisted during the COVID-19 pandemic. Public health agencies around the world, including…
Indoor CO2 sensors for COVID-19 risk mitigation: Current guidance and limitations
May 18, 2021
Primary inquiry: Information was requested regarding whether CO2 monitoring could be implemented as a COVID-19 risk mitigation tool in restaurants. Building on a previous NCCEH document in which we…
Contextualizing the risks of indirect COVID-19 transmission in multi-unit residential buildings
March 24, 2021
Introduction Since the beginning of the COVID-19 pandemic, multi-unit residential buildings (MURBs) have been of particular concern to both public health practitioners and MURB occupants. MURBs are…
Fomites and the COVID-19 pandemic: An evidence review on its role in viral transmission
March 23, 2021
Background Since the beginning of the COVID-19 pandemic, public health messaging continuously evolved as more evidence emerged about the risks associated with SARS-CoV-2 transmission and infection.…
COVID-19 risks and precautions for the performing arts
September 23, 2020
Introduction The COVID-19 pandemic has caused major changes to how musicians and performers practise and rehearse and has brought many live performances to a halt. Restrictions have been put in…