Outbreak caused by the SARS-CoV-2 Omicron variant in Norway, November to December 2021 Brandal, Lin T. and MacDonald, Emily and Veneti, Lamprini and Ravlo, Tine and Lange, Heidi and Naseer, Umaer and Feruglio, Siri and Bragstad, Karoline and Hungnes, Olav and Ødeskaug, Liz E. and Hagen, Frode and Hanch-Hansen, Kristian E. and Lind, Andreas and Watle, Sara Viksmoen and Taxt, Arne M. and Johansen, Mia and Vold, Line and Aavitsland, Preben and Nygård, Karin and Madslien, Elisabeth H., Eurosurveillance, 26, 2101147 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.50.2101147