1887
Rapid communication Open Access
Like 0

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.

Loading

Article metrics loading...

/content/10.2807/1560-7917.ES.2021.26.50.2101146
2021-12-16
2024-03-29
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2021.26.50.2101146
Loading
Loading full text...

Full text loading...

/deliver/fulltext/eurosurveillance/26/50/eurosurv-26-50-3.html?itemId=/content/10.2807/1560-7917.ES.2021.26.50.2101146&mimeType=html&fmt=ahah

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
/content/10.2807/1560-7917.ES.2021.26.50.2101146
Loading

Data & Media loading...

Supplementary data

Submit comment
Close
Comment moderation successfully completed
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error