CMAJ 2022 May;194(20):E693-E700
Scripps Institution of Oceanography (C. Chen, Benmarhnia), University of California San Diego, La Jolla, Calif.; Public Health Ontario (Wang, Kwong, Kim, H. Chen); ICES Central (Kwong, H. Chen); Dalla Lana School of Public Health (Kwong, Kim, H. Chen), and Department of Family and Community Medicine (Kwong), University of Toronto, Toronto, Ont.; Department of Energy, Environmental, and Chemical Engineering (van Donkelaar, Martin), Washington University in St. Louis, St. Louis, Mo.; College of Public Health and Human Studies (Hystad), Oregon State University, Corvallis, Ore.; Ontario Ministry of the Environment (Su), Conservation and Parks, Toronto, Ont.; Environmental Health Science and Research Bureau (Lavigne, H. Chen), Health Canada, Ottawa, Ont.; Department of Epidemiology and Biostatistics and Occupational Health (Kirby-McGregor, Kaufman), McGill University, Montréal, Que.
Background: The tremendous global health burden related to COVID-19 means that identifying determinants of COVID-19 severity is important for prevention and intervention. We aimed to explore long-term exposure to ambient air pollution as a potential contributor to COVID-19 severity, given its known impact on the respiratory system.
Methods: We used a cohort of all people with confirmed SARS-CoV-2 infection, aged 20 years and older and not residing in a long-term care facility in Ontario, Canada, during 2020. Read More