Does air pollution affect the severity of COVID-19?

Correlation of common air pollutants, such as ground-level ozone, with severe SARS-CoV-2 infection, including ICU admission, reported in a new study published on Journal of the Canadian Medical Association.

Air pollution and COVID-19

To understand the association between long-term exposure to air pollutants and the severity of COVID-19, the researchers analyzed data on 151,105 people over the age of 20 who were infected with SARS-CoV-2 in 2020 in Ontario, Canada and did not live long. care facility. Three common pre-pandemic air pollutants such as fine particulate matter (PM2.5), nitrogen dioxide (NO2) and ground-level ozone (O3) were considered for this study. The authors adjusted for date of diagnosis, sex, and age, as part of the outbreak, essential worker status, neighborhood socioeconomic status, and access to health care. including history of previous flu shots, previous outpatient visits, and other factors.

‘Long-term exposure to air pollutants such as PM2.5 and O3 is associated with a high risk of hospitalization and increased risk of death.’

“We observed that people with SARS-CoV-2 infection living in areas of Ontario with higher levels of conventional air pollution (PM2.5, NO2 and O3) were at higher risk of being admitted to the hospital. ICU after we adjusted for the individual and for contextual confounding factors, even when air pollution levels were relatively low,” said Dr. Hong Chen.

With chronic exposure to PM2.5 and O3, the risk of hospitalization is higher and the risk of death is increased with chronic exposure to O3.

These results add to growing reports linking air pollution with COVID-19 severity from other countries, including Spain and Mexico.

Dr Hong Chen said: “Given the ongoing pandemic situation, our findings highlight the link between chronic exposure to air pollution and more severe COVID-19 that may have serious consequences. important impacts on public health and health systems”.

More research is needed to understand the association between long-term exposure to air pollution and the severity of COVID-19.

Source: Medindia

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