“…In most of the reviewed papers, in the areas where the share of the population aged 60, 65, or 70 is higher, the number of cases is higher. This issue is not sensitive to the scale, as the results of studies on the country ( Sigler et al, 2021 ; Bijari et al, 2021 ), state ( Basellini and Camarda, 2021 ; Tchicaya et al, 2021 ; Ramírez-Aldana et al, 2020 ), county ( Kodera et al, 2020 ; Hamidi et al, 2020b ; Wu and Zhang, 2021 ), city ( Tieskens et al, 2021 ; Pequeno et al, 2020 ) and urban district ( Chan et al, 2021 ; López-Gay et al, 2022 ; Urban and Nakada, 2021 ) scales show the same outcomes. However, Ilardi et al (2020) ; Boterman (2020) and Mondal et al (2022) found age as an insignificant predictor of COVID-19 and Johnson et al (2021) showed that the population over 70 is a negative factor and reduces the number of cases in 299 local authorities in the UK.…”