3 URLs in this Link

www.ncbi.nlm.nih.gov

Air Pollution and COVID-19: The Role of Particulate Matter in the Spread and Increase of COVID-19’s Morbidity and Mortality

www.hsph.harvard.edu

Coronavirus and Air Pollution – C-CHANGE | Harvard T.H. Chan School of Public Health

www.ncbi.nlm.nih.gov

SARS-Cov-2RNA found on particulate matter of Bergamo in Northern Italy: First evidence