An ecological analysis of long-term exposure to PM<sub>2.5</sub> and incidence of COVID-19 in Canadian health regions.

Environ Res · 2020 · PMC7448873 · PMID 32860780

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marginally significantno p-value reported

(2020) study, another American ecological study based on approximately 3000 counties found that nitrogen dioxide (NO 2 ) was significantly associated with COVID-19 mortality and case-fatality rates, while PM 2.5 exhibited a marginally significant association with mortality ( Liang et al., 2020 ).

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