COVID-specific (CS-)sick-leave and SARS-CoV-2 weekly rates per 100 000. Yellow dashed line: CS-sick-leave is interpolated during Christmas holidays (all short holidays in the education sector). White and grey shading: the periods of SARS-CoV-2 variants are shown with alternating shaded planes (wildtype, alpha, delta, omicron). A. Overall, B. Healthcare sector and C. Education sector