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Epidemiological characterisation of the first 785 SARS-CoV-2 Omicron variant cases in Denmark, December 2021
- Laura Espenhain1 , Tjede Funk1,2 , Maria Overvad1 , Sofie Marie Edslev3 , Jannik Fonager4 , Anna Cäcilia Ingham3 , Morten Rasmussen4 , Sarah Leth Madsen5 , Caroline Hjorth Espersen1 , Raphael N. Sieber3 , Marc Stegger3 , Vithiagaran Gunalan4 , Bartlomiej Wilkowski6,7 , Nicolai Balle Larsen6 , Rebecca Legarth1 , Arieh Sierra Cohen6 , Finn Nielsen8 , Janni Uyen Hoa Lam8 , Kjetil Erdogan Lavik8 , Marianne Karakis8 , Katja Spiess4 , Ellinor Marving4 , Christian Nielsen6,7 , Christina Wiid Svarrer3 , Jonas Bybjerg-Grauholm9 , Stefan Schytte Olsen8 , Anders Jensen6,7 , Tyra Grove Krause10 , Luise Müller1
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View Affiliations Hide AffiliationsAffiliations: 1 Infectious Disease Epidemiology and Prevention, Statens Serum Institut, Copenhagen, Denmark 2 European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, (ECDC), Stockholm, Sweden 3 Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark 4 Virus and Microbiological Special Diagnostics, Statens Serum Institut, Copenhagen, Denmark 5 COVID-19 tracing Unit, Danish Patient Safety Authority, Copenhagen, Denmark 6 TestCenter Denmark, Statens Serum Institut, Copenhagen, Denmark 7 Danish National Biobank, Statens Serum Institut, Copenhagen, Denmark 8 The Data integration and Analysis Secretariat, Statens Serum Institut, Copenhagen, Denmark 9 Congenital disorders, Statens Serum Institut, Copenhagen, Denmark 10 Epidemiological Infectious Disease Preparedness, Statens Serum Institut, Copenhagen, DenmarkLaura Espenhainlaes ssi.dk
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Citation style for this article: Espenhain Laura, Funk Tjede, Overvad Maria, Edslev Sofie Marie, Fonager Jannik, Ingham Anna Cäcilia, Rasmussen Morten, Madsen Sarah Leth, Espersen Caroline Hjorth, Sieber Raphael N., Stegger Marc, Gunalan Vithiagaran, Wilkowski Bartlomiej, Larsen Nicolai Balle, Legarth Rebecca, Cohen Arieh Sierra, Nielsen Finn, Lam Janni Uyen Hoa, Lavik Kjetil Erdogan, Karakis Marianne, Spiess Katja, Marving Ellinor, Nielsen Christian, Wiid Svarrer Christina, Bybjerg-Grauholm Jonas, Olsen Stefan Schytte, Jensen Anders, Krause Tyra Grove, Müller Luise. Epidemiological characterisation of the first 785 SARS-CoV-2 Omicron variant cases in Denmark, December 2021. Euro Surveill. 2021;26(50):pii=2101146. https://doi.org/10.2807/1560-7917.ES.2021.26.50.2101146 Received: 10 Dec 2021; Accepted: 15 Dec 2021
Abstract
By 9 December 2021, 785 SARS-CoV-2 Omicron variant cases have been identified in Denmark. Most cases were fully (76%) or booster-vaccinated (7.1%); 34 (4.3%) had a previous SARS-CoV-2 infection. The majority of cases with available information reported symptoms (509/666; 76%) and most were infected in Denmark (588/644; 91%). One in five cases cannot be linked to previous cases, indicating widespread community transmission. Nine cases have been hospitalised, one required intensive care and no deaths have been registered.
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References
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