SARS-CoV-2 concentrations and virus-laden aerosol size distributions in outdoor air in north and south of Italy oleh D. Chirizzi, M. Conte, M. Feltracco, A. Dinoi, E. Gregoris, E. Barbaro, G. La Bella, G. Ciccarese, G. La Salandra, A. Gambaro, D. Contini