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Abstract

By 9 December 2021, 785 SARS-CoV-2 Omicron variant cases have been identified in Denmark. Most cases were fully (76%) or booster-vaccinated (7.1%); 34 (4.3%) had a previous SARS-CoV-2 infection. The majority of cases with available information reported symptoms (509/666; 76%) and most were infected in Denmark (588/644; 91%). One in five cases cannot be linked to previous cases, indicating widespread community transmission. Nine cases have been hospitalised, one required intensive care and no deaths have been registered.

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/content/10.2807/1560-7917.ES.2021.26.50.2101146
2021-12-16
2024-11-21
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2021.26.50.2101146
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References

  1. World Health Organization (WHO). Classification of Omicron (B.1.1.529): SARS-CoV-2 variant of concern. Geneva: WHO; 2021. Available from: https://www.who.int/news/item/26-11-2021-classification-of-omicron-(b.1.1.529)-sars-cov-2-variant-of-concern
  2. Statens Serum Institut (SSI). Covid-19 – Danmark (kommunalt). [COVID-19 Denmark (by municipality)]. Copenhagen: SSI. [Accessed: 9 Dec 2021]. Danish. Available from: https://experience.arcgis.com/experience/aa41b29149f24e20a4007a0c4e13db1d/page/page_0
  3. Statens Serum Institut (SSI). Covid-19 – Danmark (regionalt). [COVID-19 Denmark (by region)]. Copenhagen: SSI. [Accessed: 9 Dec 2021]. Danish. Available from: https://experience.arcgis.com/experience/aa41b29149f24e20a4007a0c4e13db1d/page/page_3
  4. Danish Covid-19 Genome Consortium. Genomic overview of SARS-CoV-2 in Denmark. Copenhagen: Statens Serum Institut. [Accessed: 14 December 2021]. Available from: https://www.covid19genomics.dk/statistics
  5. Spiess K, Gunalan V, Marving E, Nielsen SH, Jørgensen MGP, Fomsgaard AS, et al. Rapid surveillance platforms for key SARS-CoV-2 mutations in Denmark. medRxiv. 2021:2021.10.25.21265484. Preprint. https://doi.org/10.1101/2021.10.25.21265484
  6. Schønning K, Dessau RB, Jensen TG, Thorsen NM, Wiuff C, Nielsen L, et al. Electronic reporting of diagnostic laboratory test results from all healthcare sectors is a cornerstone of national preparedness and control of COVID-19 in Denmark. APMIS. 2021;129(7):438-51.  https://doi.org/10.1111/apm.13140  PMID: 33949007 
  7. Katoh K, Standley DM. MAFFT multiple sequence alignment software version 7: improvements in performance and usability. Mol Biol Evol. 2013;30(4):772-80.  https://doi.org/10.1093/molbev/mst010  PMID: 23329690 
  8. Minh BQ, Schmidt HA, Chernomor O, Schrempf D, Woodhams MD, von Haeseler A, et al. IQ-TREE 2: New Models and Efficient Methods for Phylogenetic Inference in the Genomic Era. Mol Biol Evol. 2020;37(5):1530-4.  https://doi.org/10.1093/molbev/msaa015  PMID: 32011700 
  9. Li W, Godzik A. Cd-hit: a fast program for clustering and comparing large sets of protein or nucleotide sequences. Bioinformatics. 2006;22(13):1658-9.  https://doi.org/10.1093/bioinformatics/btl158  PMID: 16731699 
  10. European Centre for Disease Prevention and Control (ECDC). Threat assessment brief: Implications of the further emergence and spread of the SARS CoV 2 B.1.1.529 variant of concern (Omicron) for the EU/EEA first update. Stockholm: ECDC; 2021. Available from: https://www.ecdc.europa.eu/en/publications-data/covid-19-threat-assessment-spread-omicron-first-update
  11. World map: total tests performed relative to the size of the population. Our World in Data. Accessed 15 December 2021. Available from: https://ourworldindata.org/coronavirus-testing#world-map-total-tests-performed-relative-to-the-size-of-population
  12. South African Institute for Communicable Diseases (NICD) Division of the National Health Laboratory Service. New COVID-19 variant detected in South Africa. Johannesburg: NICD; 2021. Available from: https://www.nicd.ac.za/new-covid-19-variant-detected-in-south-africa
  13. Sundhedsministeriet (Danish Ministry of Health). Danmark indfører indrejserestriktioner for syv lande i det sydlige Afrika. [Denmark introduces entry restrictions for seven countries in southern Africa]. Copenhagen: Sundhedsministeriet; 2021. Danish. Available from: https://sum.dk/nyheder/2021/november/danmark-indfoerer-indrejserestriktioner-for-syv-lande-i-det-sydlige-afrika
  14. Statens Serum Institut (SSI). De to mistænkte tilfælde af coronavirus varianten Omicron i Danmark er nu bekræftet. [The two suspected cases of coronavirus variant Omicron in Denmark are now confirmed]. Copenhagen: SSI; 2021. Danish. Available from: https://www.ssi.dk/aktuelt/nyheder/2021/de-to-mistaenkte-tilfaelde-af-coronavirus-varianten-omicron-i-danmark-er-nu-bekraeftet
  15. Sundhedsstyrelsen (Danish Health Authority). Nye skærpede retningslinjer for smitteopsporing ved smitte eller mistanke om smitte med den nye virusvariant Omicron. [New stricter guidelines for contact tracing in cases of infection or suspected infection with the new virus variant Omicron]. Copenhagen: Sundhedsstyrelsen; 2021. Danish. Available from: https://www.sst.dk/da/Nyheder/2021/Nye-skaerpede-retningslinjer-for-smitteopsporing-Omicron
  16. Sundhedsministeriet (Danish Ministry of Health). Danmark indfører skærpede rejserestriktioner for yderligere tre lande i det sydlige Afrika [Denmark introduces stricter travel restrictions for another three countries in southern Africa]. Copenhagen: Sundhedsministeriet; 2021. Danish. Available from: https://sum.dk/nyheder/2021/november/danmark-indfoerer-skaerpede-rejserestriktioner-for-yderligere-tre-sydafrikanske-lande
  17. Sundhedsministeriet (Danish Ministry of Health). Indrejsereglerne skærpes yderligere med krav om test ved ankomst fra udvalgte lufthavne. [Entry rules further tightened with requirement to test on arrival from selected airports]. Copenhagen: Sundhedsministeriet; 2021. Danish. Available from: https://sum.dk/nyheder/2021/december/indrejsereglerne-skaerpes-yderligere-med-krav-om-test-ved-ankomst-fra-udvalgte-lufthavne
  18. Statens Serum Institut (SSI). Status på omikron-varianten (B.1.1.529) pr. 05.12.21. [Status of the Omikron variant (B.1.1.529) on 5 Dec 2021]. Copenhagen: SSI; 2021. Danish. Available from: https://www.ssi.dk/aktuelt/nyheder/2021/status-pa-omikron-varianten-b11529-pr-051221
  19. Sundhedsstyrelsen (Danish Health Authority). Nære kontakters nære kontakter skal ikke længere gå i selvisolation. [Close contacts of close contacts no longer need to self-isolate]. Copenhagen: Sundhedsstyrelsen; 2021. Danish. Available from: https://www.sst.dk/da/Nyheder/2021/Naere-kontakters-naere-kontakter-skal-ikke-laengere-gaa-i-selvisolation
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