Washington [US], May 24 (ANI): A study has found that air pollution is associated with a higher risk of developing severe disease, admission to a hospital or an intensive care unit (ICU) and death by COVID-19.

The study was published in the journal, 'Nature Communications'.

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The study was based on a large cohort of 4,660,502 adults resident in Catalonia in 2020, the year the Spanish autonomous community had a high incidence of COVID-19.

The researchers determined the mean annual levels of fine particulate matter (PM2.5, particles with an aerodynamic diameter of

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