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Outbreak caused by the SARS-CoV-2 Omicron variant in Norway, November to December 2021.
Brandal, Lin T; MacDonald, Emily; Veneti, Lamprini; Ravlo, Tine; Lange, Heidi; Naseer, Umaer; Feruglio, Siri; Bragstad, Karoline; Hungnes, Olav; Ødeskaug, Liz E; Hagen, Frode; Hanch-Hansen, Kristian E; Lind, Andreas; Watle, Sara Viksmoen; Taxt, Arne M; Johansen, Mia; Vold, Line; Aavitsland, Preben; Nygård, Karin; Madslien, Elisabeth H.
  • Brandal LT; Norwegian Institute of Public Health, Oslo, Norway.
  • MacDonald E; Norwegian Institute of Public Health, Oslo, Norway.
  • Veneti L; Norwegian Institute of Public Health, Oslo, Norway.
  • Ravlo T; Municipality of Oslo, Norway.
  • Lange H; Norwegian Institute of Public Health, Oslo, Norway.
  • Naseer U; Norwegian Institute of Public Health, Oslo, Norway.
  • Feruglio S; Norwegian Institute of Public Health, Oslo, Norway.
  • Bragstad K; Norwegian Institute of Public Health, Oslo, Norway.
  • Hungnes O; Norwegian Institute of Public Health, Oslo, Norway.
  • Ødeskaug LE; Norwegian Institute of Public Health, Oslo, Norway.
  • Hagen F; Municipality of Oslo, Norway.
  • Hanch-Hansen KE; Municipality of Oslo, Norway.
  • Lind A; Department of Microbiology, Oslo University Hospital, Oslo, Norway.
  • Watle SV; Norwegian Institute of Public Health, Oslo, Norway.
  • Taxt AM; Norwegian Institute of Public Health, Oslo, Norway.
  • Johansen M; Norwegian Institute of Public Health, Oslo, Norway.
  • Vold L; Norwegian Institute of Public Health, Oslo, Norway.
  • Aavitsland P; Norwegian Institute of Public Health, Oslo, Norway.
  • Nygård K; Norwegian Institute of Public Health, Oslo, Norway.
  • Madslien EH; Norwegian Institute of Public Health, Oslo, Norway.
Euro Surveill ; 26(50)2021 Dec.
Article in English | MEDLINE | ID: covidwho-1591908
ABSTRACT
In late November 2021, an outbreak of Omicron SARS-CoV-2 following a Christmas party with 117 attendees was detected in Oslo, Norway. We observed an attack rate of 74% and most cases developed symptoms. As at 13 December, none have been hospitalised. Most participants were 30-50 years old. Ninety-six percent of them were fully vaccinated. These findings corroborate reports that the Omicron variant may be more transmissible, and that vaccination may be less effective in preventing infection compared with Delta.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Observational study Topics: Long Covid / Vaccines / Variants Limits: Adult / Humans / Middle aged Country/Region as subject: Europa Language: English Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: 1560-7917.Es.2021.26.50.2101147

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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Observational study Topics: Long Covid / Vaccines / Variants Limits: Adult / Humans / Middle aged Country/Region as subject: Europa Language: English Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: 1560-7917.Es.2021.26.50.2101147