Of Microbiology, Oslo University Hospital, Oslo, Norway * These authors contributed equally to this function and share initial authorship. Correspondence: Lin T. Brandal ([email protected])Citation style for this short article: Brandal Lin T., MacDonald Emily, Veneti Lamprini, Ravlo Tine, Lange Heidi, Naseer Umaer, Feruglio Siri, Bragstad Karoline, Hungnes Olav, eskaug Liz E., Hagen Frode, Hanch-Hansen Kristian E., Lind Andreas, Watle Sara Viksmoen, Taxt Arne M., Johansen Mia, Vold Line, Aavitsland Preben, Nyg d Karin, Madslien Elisabeth H.. Outbreak caused by the SARS-CoV-2 Omicron variant in Norway, November to December 2021. Euro Surveill. 2021;26(50):pii=2101147. doi. org/10.2807/1560-7917.ES.2021.26.50.2101147 Article submitted on 10 Dec 2021 / accepted on 15 Dec 2021 / published on 16 DecIn late November 2021, an outbreak of Omicron SARSCoV-2 following a Christmas party with 117 attendees was detected in Oslo, Norway. We observed an attack price of 74 and most situations developed symptoms. As at 13 December, none happen to be hospitalised.Fmoc-D-Tyr(3-I)-OH Price Most participants had been 30?0 years old. Ninety-six percent of them had been totally vaccinated. These findings corroborate reports that the Omicron variant might be more transmissible, and that vaccination may be much less effective in stopping infection compared with Delta. On 30 November 2021 the Norwegian Institute of Public Health (NIPH) was notified by a local laboratory in Oslo of a coronavirus illness (COVID-19) case with suspected severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant of concern (VOC) (Phylogenetic Assignment of Named Worldwide Outbreak Lineages (Pangolin) designation B.1.1.529 BA.1) infection [1]. The laboratory provided info that the case was likely exposed at a business Christmas party held on 26 November 2021 and that one of many attendees had returned from South Africa on 24 November 2021.1022-79-3 Order The novel SARS-CoV-2 variant Omicron was initial detected in samples collected mid-November 2021 in Botswana and South Africa [2]. Here we describe the outbreak and preliminary findings from our epidemiological investigations.spot for events in the time in Norway, all attendees of your party were reported to become totally vaccinated and had been asked by the organiser to execute a speedy antigen self-test. For other guests going to the venue and employees operating at the restaurant, there have been no specifications for vaccination, COVID-19 testing, facemask use or COVID certificate, and a guest list was not maintained. Attendees of the party mingled at the venue before and soon after dinner, following which the bar and dance location was opened towards the public.PMID:24624203 Soon after detection in the outbreak on 30 November, all attendees in the party have been requested by the municipality medical doctor in Oslo to self-quarantine at dwelling for 10 days and to immediately take a PCR test. Those who tested constructive were required to stay in isolation for at the least 7 days [3]. Also, a public message was released on 1 December asking everyone who had been at the venue from 22:30 on 26 November to 03:00 on 27 November to have tested by PCR as soon as you can, no matter symptoms.Outbreak investigationSettingThe closed event was held in a separate room (ca 145 m2) within a restaurant in Oslo from 18:00 to 22:30, after which the venue was opened to the public from 22:30 to 03:00. A pre-party had been arranged for the Christmas celebration attendees at a separate venue, soon after which they have been transported by private buses for the restaurant.