Coronavirus disease 2019 (COVID-19) surged as an ongoing worldwide pandemic throughout 2020 (Park et al., 2020; Siordia, 2020). The first Danish cases were reported in late February 2020, and the initial spread of infection most likely originated from ski tourists returning from Northern Italy and Austria (Madsen et al., 2021). The first epidemic wave in Denmark peaked in late March and early April, with 9.2 patients admitted to hospital per 100 000 population (Madsen et al., 2021; Statens Serum Institut 2021).