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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

dc.contributor.authorVeneti, Lamprini
dc.contributor.authorBøås, Håkon
dc.contributor.authorKristoffersen, Anja Bråthen
dc.contributor.authorStålcrantz, Jeanette
dc.contributor.authorBragstad, Karoline
dc.contributor.authorHungnes, Olav
dc.contributor.authorStorm, Margrethe Larsdatter
dc.contributor.authorAasand, Nina Therese
dc.contributor.authorRø, Gunnar Øyvind Isaksson
dc.contributor.authorStarrfelt, Jostein
dc.contributor.authorSeppälä, Elina Marjukka
dc.contributor.authorKvåle, Reidar
dc.contributor.authorVold, Line
dc.contributor.authorNygård, Karin
dc.contributor.authorBuanes, Eirik Alnes
dc.contributor.authorWhittaker, Robert Neil
dc.date.accessioned2022-04-29T12:49:11Z
dc.date.available2022-04-29T12:49:11Z
dc.date.created2022-04-19T10:44:42Z
dc.date.issued2022
dc.identifier.issn1025-496X
dc.identifier.urihttps://hdl.handle.net/11250/2993447
dc.description.abstractWe 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, Omicron cases who had completed primary two-dose vaccination 7–179 days before diagnosis had a lower reduced risk than Delta (66% vs 93%). People vaccinated with three doses had a similar risk reduction (86% vs 88%).en_US
dc.language.isoengen_US
dc.publisherECDCen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleReduced 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 2022en_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.source.articlenumberpii=2200077en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.2807/1560-7917.ES.2022.27.4.2200077
dc.identifier.cristin2017498
dc.source.journalEurosurveillanceen_US
dc.identifier.citationEurosurveillance. 2022, 27 (4), pii=2200077.en_US
dc.source.volume27en_US
dc.source.issue4en_US


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