“…acute) exposure (measured as the temporal variation of air pollutants), Xu et al (2020) (in 33 locations in China), Zhu et al (2020) (in 120 cities in China), Jiang et al (2020) (3 cities in China), Li H et al (2020) (2 cities in China) and Adhikari et al (2020) (in Queens, New York) found significantly positive associations between the short-term exposure to air pollutants with newly confirmed cases. Furthermore, as Domingo et al (2020) point out, in a very recent review, the results of most of the studies suggest that the long-term exposure to air pollutants might lead to more severe and lethal forms of Most of the studies evaluating socioeconomic and demographic variables (four of the six studies) considered population density (Coccia, 2020;Ahmadi et al, 2020;Pequeno et al, 2020;and You et al 2020). Three studies evaluated the influence of income (Azar et al, 2020;You et al, 2020;and Price-Haywood et al, 2020).…”