Reduced risk of hospitalisation among reported COVID-19 cases infected with the SARS-CoV-2 Omicron BA.1 variant compared with the Delta variant, Norway, December 2021 to January 2022

We included 39,524 COVID-19 Omicron and 51,481 Delta cases reported in Norway from December 2021 to January 2022. We estimated a 73% reduced risk of hospitalisation (adjusted hazard ratio: 0.27; 95% confidence interval: 0.20-0.36) for Omicron compared with Delta. Compared with unvaccinated groups, O...

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Bibliographic Details
Published in:	Euro surveillance : bulletin européen sur les maladies transmissibles Vol. 27; no. 4
Main Authors:	Veneti, Lamprini, Bøås, Håkon, Bråthen Kristoffersen, Anja, Stålcrantz, Jeanette, Bragstad, Karoline, Hungnes, Olav, Storm, Margrethe Larsdatter, Aasand, Nina, Rø, Gunnar, Starrfelt, Jostein, Seppälä, Elina, Kvåle, Reidar, Vold, Line, Nygård, Karin, Buanes, Eirik Alnes, Whittaker, Robert
Format:	Journal Article
Language:	English
Published:	Sweden Centre Europeen pour la Surveillance Epidemiologique du SIDA (European Centre for the Epidemiological Monitoring of AIDS) 27-01-2022 European Centre for Disease Prevention and Control (ECDC)
Subjects:	COVID-19 Disease prevention Hospitalization Humans Pandemics Proportional Hazards Models Rapid Communication Risk factors SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 Norway COVID-19 Omicron B.1.1.529 Delta Norway hospitalisation
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