“…Moreover, they can help to estimate the burden of SARS-CoV-2 among different sector and identify jobs with higher risk of infection. Despite general population-based seroepidemiological surveys were done ( Chen et al , 2021 ) and many studies were conducted focusing on healthcare workers ( Galanis et al , 2020 ), few studies were available on the other specific worker sectors ( Alali et al , 2020 ; Caban-Martinez et al , 2020 ; Chughtai et al , 2020 ; Halatoko et al , 2020 ; Lopez et al , 2020 ; Payne et al , 2020 ; Jerković et al , 2021 ; Lewnard et al , 2021 ; Ortiz-Prado et al , 2021 ). In Italy, a seroprevalence survey involving 64660 subjects was conducted between May 25 and July 15 by the National Institute of Statistics (ISTAT) and reported an overall seroprevalence of 2.5%, even if there is high variability among regions, with values of 3.0% [95% CI 2.2–3.8] and 7.5% [95%CI 6.8–8.3] of positive proportion in Piedmont and Lombardy, respectively (Northern western Italian regions) ( Istat, 2020 ).…”