Molecular epidemiology of the SARS-CoV-2 variant Omicron BA.2 sub-lineage in Denmark, 29 November 2021 to 2 January 2022

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  • Jannik Fonager
  • Marc Bennedbæk
  • Peter Bager
  • Jan Wohlfahrt
  • Kirsten Maren Ellegaard
  • Anna Cäcilia Ingham
  • Sofie Marie Edslev
  • Marc Stegger
  • Raphael Niklaus Sieber
  • Ria Lassauniere
  • Anders Fomsgaard
  • Christina Wiid Svarrer
  • Frederik Trier Møller
  • Camilla Holten Møller
  • Rebecca Legarth
  • Thomas Vognbjerg Sydenham
  • Kat Steinke
  • Sarah Juel Paulsen
  • José Alfredo Samaniego Castruita
  • Christian Højte Schouw
  • Xiaohui Chen Nielsen
  • Maria Overvad
  • Rikke Thoft Nielsen
  • Rasmus L. Marvig
  • Martin Schou Pedersen
  • Lene Nielsen
  • Line Lynge Nilsson
  • Jonas Bybjerg-Grauholm
  • Irene Harder Tarpgaard
  • Tine Snejbjerg Ebsen
  • Janni Uyen Hoa Lam
  • Vithiagaran Gunalan
  • Morten Rasmussen

Following emergence of the SARS-CoV-2 variant Omicron in November 2021, the dominant BA.1 sub-lineage was replaced by the BA.2 sub-lineage in Denmark. We analysed the first 2,623 BA.2 cases from 29 November 2021 to 2 January 2022. No epidemiological or clinical differences were found between individuals infected with BA.1 versus BA.2. Phylogenetic analyses showed a geographic east-to-west transmission of BA.2 from the Capital Region with clusters expanding after the Christmas holidays. Mutational analysis shows distinct differences between BA.1 and BA.2.

Original languageEnglish
JournalEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin
Volume27
Issue number10
Number of pages7
ISSN1025-496X
DOIs
Publication statusPublished - 2022

    Research areas

  • COVID-19/epidemiology, Denmark/epidemiology, Humans, Molecular Epidemiology, Phylogeny, SARS-CoV-2/genetics

ID: 301455374