Air pollution can increase the risk of COVID infection and severe disease – a roundup of what we know

By Samuel J. White, Senior Lecturer in Genetic Immunology, Nottingham Trent University
Philippe B. Wilson, Professor of One Health, Nottingham Trent University

The early part of the COVID pandemic led to a significant reduction in air pollution in many parts of the world. With lockdowns, travel restrictions and decreased economic activity, there was a noticeable drop in the emission of air pollutants, such as nitrogen dioxide (NO₂) and particulate matter (PM) that is fine enough to be inhaled.

Changes in air pollution varied depending on the location and the type of pollutant,…

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