“…The data were cleaned and then transferred to STATA16 TM (Stata Corp., College Station, TX, USA) for statistical analysis. The 26 Swiss cantons and the Principality of Liechtenstein were grouped according to the COVID-19 prevalence as follows [8,15]: Areas of a low prevalence of COVID-19 lower than 0.30% were grouped together (AG, AI, AR, LU, FL, NW, OW, SG, SH, SO, SZ, TG, TI, ZG). Regions with a prevalence between 0.33% and 0.62% were grouped together as middle prevalence (BL, BS, FR, GL, GL, GR, JU, NE, UR, VS, ZH).…”