Air pollutant nitrogen dioxide may contribute to intensive care admissions, German study finds
Photograph: Kateryna Kon/Science Photo LibraryPhotograph: Kateryna Kon/Science Photo LibraryPeople who contract Covid-19 are more likely to suffer severe symptoms if they have been exposed to air pollution for long periods.
“Our results show a positive association between long-term nitrogen dioxide exposure and Covid-19 fatality and Covid-19 incidence rate,” said the team of German researchers, who were led by Susanne Koch, of Universitätsmedizin Berlin, a large teaching hospital. The group also studied data on how many Covid patients in German hospitals had required ICU treatment and mechanical ventilation during one month in 2020. These figures were adjusted for other factors, such as pre-existing health conditions.
The German study did not prove a causative relationship between air pollution and severe Covid, the researchers admitted. However, they did suggest a plausible causal link that could explain the relationship between severe Covid and levels of nitrogen dioxide in the atmosphere.
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