Air Pollution as a Potential Risk Factor for COVID-19 Spread: A Case Study of Italian Provincial Capitals

This study investigates the potential association between air pollution and the spread of coronavirus disease 2019 (COVID-19). Employing Italy as a case study, the research explores the diffusion patterns of COVID-19 within Italian provincial capitals. Findings suggest a correlation between elevated levels of air pollution and the number of confirmed cases. Cities exceeding air quality limits for PM10 or ozone for more than 100 days annually exhibited significantly higher caseloads compared to those with lower pollution levels. Additionally, the analysis reveals that hinterland locations (inland areas) with both high air pollution and low wind speed displayed a particularly pronounced increase in infection rates. Notably, over 75% of confirmed COVID-19 cases and approximately 81% of related deaths in Italy occurred in regions with high air pollution levels. These findings underscore the potential role of environmental factors in COVID-19 transmission and highlight the necessity for long-term public health strategies that integrate environmental and sustainability policies alongside medical interventions.