Occupational risk of COVID-19 in the first versus second epidemic wave in Norway, 2020 Magnusson, Karin and Nygård, Karin and Methi, Fredrik and Vold, Line and Telle, Kjetil, Eurosurveillance, 26, 2001875 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.40.2001875