Study Finds Long-Term Exposure To Air Pollution May Increase Virus Risk
The Daily Guardian|January 17, 2022
Long term exposure to ambient air pollution may heighten the risk of COVID-19 infection, suggests recent research.

The association was strongest for particulate matter, with an average annual raise of 1 ug/m3 linked to a 5 per cent increase in the infection rate. This equates to an extra 294 cases/100,000 people a year, according to the findings, which focus on the inhabitants of one Northern Italian city.

While further research is needed to confirm cause and effect, the findings should reinforce efforts to cut air pollution, say the researchers.

Northern Italy has been hit hard by the coronavirus pandemic, with Lombardy the worst affected region in terms of both cases and deaths. Several reasons have been suggested for this, including different testing strategies and demographics. But estimates from the European Union Environmental Agency show that most of the 3.9 million Europeans residing in areas where air pollution exceeds European limits live in Northern Italy.

Recent research has implicated airborne pollution as a risk factor for COVID-19 infection, but study design flaws and data capture only up to mid-2020 have limited the findings, say the researchers.

To get around these issues, they looked at long term exposure to airborne pollutants and patterns of COVID-19 infection from the start of the pandemic to March 2021 among the residents of Varese, the eighthlargest city in Lombardy.

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