Air pollution has been implicated as a factor that increases the transmissibility of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), leading to more COVID-19 cases. ..
A study published in the Lancet looked at “the association of introducing and lifting NPIs with the level of transmission of SARS-CoV-2, as measured by the time-varying reproduction number (R), from a broad perspective across 131 countries”