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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Detalles Bibliográficos
Autores principales: 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
Formato: Online Artículo Texto
Lenguaje:English
Publicado: European Centre for Disease Prevention and Control (ECDC) 2022
Materias:
Rapid Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8796289/
https://www.ncbi.nlm.nih.gov/pubmed/35086614
http://dx.doi.org/10.2807/1560-7917.ES.2022.27.4.2200077
Descripción
Sumario: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, 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%).

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