Coronavirus: link to Covid-19 severity and air pollution – BBC News

Harvard’s latest study is the first study to show a statistical link between COVID-19 and other diseases related to exposure to fine particles.
In a study of 3,080 counties in the United States, T.H. Public Health Chan found that high levels of small and small airborne particles known as PM 2.5 had a higher disease-related death rate.

It is written that a small increase in long-term exposure to contamination may have serious coronavirus-related effects, while also accounting for other factors such as smoking rates and population density.

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