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    Long term exposure to air pollution may heighten COVID-19 risk

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    Long-term exposure to air pollution may increase the risk of COVID-19 infection, suggesting a study published online in the journal. Occupational medicine and environmental medicine..

    This association was strongest for particulate matter, with an average annual increase of 1 µg / m.3 Linked to a 5% increase in infection ratio. This is equivalent to an additional 294 cases / 100,000 people per year and shows the results of a survey focusing on the inhabitants of one city in Northern Italy.

    Further research is needed to determine the cause and effect, but the findings should step up efforts to reduce air pollution, researchers say.

    Northern Italy has been hit hard by the coronavirus pandemic, and Lombardy is the region most affected in terms of both cases and deaths. There are several reasons for this, including various testing strategies and demographics.

    However, the European Union Environment Agency estimates that most of the 3.9 million Europeans living in areas where air pollution exceeds the limits of Europe live in northern Italy.

    Recent studies have identified air pollution as a risk factor for COVID-19 infection, but researchers say that research design flaws and data collection were only discovered until mid-2020.

    To avoid these problems, they have long-term exposure to air pollutants and COVID-19 from the start of the pandemic to March 2021 among the inhabitants of Varese, the eighth largest city in Lombardy. I investigated the pattern of infection.

    Of the 81,543 residents as of December 31, 2017, more than 97% were successfully associated with the 2018 average annual exposure levels of major air pollutants based on their home address.

    From the end of 2019 to the end of March 2021, on regional COVID-19 infection data and discharge and outpatient prescriptions for 62,848 adults who have not yet been infected with SARS-CoV-2, the virus responsible for COVID-19. Information has been collected.

    By the end of March 2021, only 3.5% of the population in the entire region had been fully vaccinated, according to official figures.

    Estimates of annual and seasonal average levels of five air pollutants for 2018 were available in areas over 40 km wide. Particulate matter (afternoon2.5, PMTen); Nitrogen dioxide (NO2); Nitric oxide (NO); and ozone (O)3).

    Average PM2.5 And NO2 Values ​​were 12.5 and 20.1 µg / m3, Each. Corresponding population-weighted average annual exposures in Italy for the same year were 15.5 and 20.1 µg / m.3, Each.

    The study included approximately 4408 new COVID-19 cases enrolled between February 25, 2020 and March 13, 2021. This is equivalent to a ratio of 6005 cases / 100,000 people / year.

    Population density was not associated with an increased risk of infection. However, living in a home care facility was associated with a 10-fold increased risk of infection.

    Diabetes drug treatment, High blood pressure, And a history of obstructive airway disease, and stroke were also associated with an increased risk of 17%, 12%, 17%, and 29%, respectively.

    After considering age, gender, place of residence of the care facility, as well as simultaneous long-term conditions, average, both PMs2.5 And PMTen It was significantly associated with an increase in COVID-19 infection rate.

    Every 1 µg / m3 Increased long-term exposure to PM2.5 It is associated with a 5% increase in the number of new cases of COVID-19 infection, which corresponds to 294 additional cases per 100,000 population / year.

    Similar results were obtained by applying the seasonal average instead of the annual average. These findings were confirmed in a further analysis that excluded long-term care facility residents and further adjusted for local poverty levels and public transport use. Similar findings were observed for PMTen, no2 And no.

    The observed associations are even more pronounced among the elderly group, indicating a stronger effect of pollutants on COVID-19 infection rates between ages 55-64 and 65-74, the researchers said. Suggests.

    Since this is an observational study, the cause cannot be determined. Researchers have also considered a variety of potentially influential factors, but have failed to explain mobility, social interactions, humidity, temperature, and certain underlying disorders such as mental illness and kidney disease. ..

    Long-term exposure to air pollution increases the risk of respiratory and cardiovascular disease through persistent inflammation and weakened immunity. Therefore, researchers suggest that these same pathways may be involved in the association between air pollution and higher COVID-19 infection rates.

    “Our findings provide the first solid empirical evidence of a hypothetical pathway linking long-term exposure to air pollution to the incidence of COVID-19 and deserve future generalization in a variety of situations,” they said. Concludes.

    “In the meantime, the government is trying to reduce it further. Air pollution Levels help reduce the public health burden of COVID-19. ”


    Air pollution does not increase the risk of infection, but it does increase the risk of getting sick from COVID-19


    For more information:
    Long-term exposure to air pollution and the incidence of COVID-19: a prospective study of residents of the city of Varese in northern Italy, Occupational medicine and environmental medicine, oem.bmj.com/lookup/doi/10.1136/oemed-2021-107833

    Quote: Long-term exposure to air pollution is a COVID-19 risk obtained on January 10, 2022 from https: //medicalxpress.com/news/2022-01-term-exposure-air-pollution-heighten.html ( May 10, 2022)

    This document is subject to copyright. No part may be reproduced without written permission, except for fair transactions for personal investigation or research purposes. Content is provided for informational purposes only.

    Long term exposure to air pollution may heighten COVID-19 risk Source link Long term exposure to air pollution may heighten COVID-19 risk

    The post Long term exposure to air pollution may heighten COVID-19 risk appeared first on California News Times.

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