Molecular epidemiology of the SARS-CoV-2 variant Omicron BA.2 sub-lineage in Denmark, 29 November 2021 to 2 January 2022
Open accessAbstract
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.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In some countries, BA.2 was responsible for a greater share of cases, hospitalizations and deaths during the Omicron wave.
“in some countries, BA.2 was responsible for a greater share of cases, hospitalizations and deaths during the Omicron wave2–4.”
From Emergence of SARS-CoV-2 Omicron lineages BA.4 and BA.5 in South Africa (2022) · cites this paper as [3]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
The citation lists haven’t been fetched yet
References 24 · Cited by 78
- Authors
- Fonager, J., Bennedbæk, M., Bager, P., Wohlfahrt, J., Ellegaard, K. M., Ingham, A. C., Edslev, S. M., Stegger, M., Sieber, R. N., Lassauniere, R., Fomsgaard, A., Lillebaek, T., Svarrer, C. W., Møller, F. T., Møller, C. H., Legarth, R., Sydenham, T. V., Steinke, K., Paulsen, S. J., Castruita, J. A. S., Schneider, U. V., Schouw, C. H., Nielsen, X. C., Overvad, M., Nielsen, R. T., Marvig, R. L., Pedersen, M. S., Nielsen, L., Nilsson, L. L., Bybjerg-Grauholm, J., Tarpgaard, I. H., Ebsen, T. S., Lam, J. U. H., Gunalan, V., & Rasmussen, M.
- Affiliations
- Statens Serum Institut (DK)
- Virus Research and Development Laboratory, Virus and Microbiological Special Diagnostics, Statens Serum Institut, Copenhagen, Denmark
- Odense University Hospital (DK)
- Amager Hospital (DK)
- Zealand University Hospital Køge (DK)
- Copenhagen University Hospital (DK)
- Herlev Hospital (DK)
- Department for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark
- Aarhus University Hospital (DK)
- Corresponding author
- Fonager, Jannik
- Gunalan, Vithiagaran
- Rasmussen, Morten
- ORCID
- Fonager, Jannik
- Bennedbæk, Marc
- Bager, Peter
- Wohlfahrt, Jan
- Ingham, Anna Cäcilia
- Edslev, Sofie Marie
- Stegger, Marc
- Sieber, Raphael Niklaus
- Lassauniere, Ria
- Fomsgaard, Anders
- Lillebaek, Troels
- Møller, Frederik Trier
- Møller, Camilla Holten
- Sydenham, Thomas Vognbjerg
- Steinke, Kat
- Castruita, José Alfredo Samaniego
- Schneider, Uffe Vest
- Marvig, Rasmus L
- Bybjerg-Grauholm, Jonas
- Gunalan, Vithiagaran
- Rasmussen, Morten
- Venue
- Eurosurveillance
- Published
- 2022-03-10
- Volume
- 27
- Issue
- 10
- ISSN
- 1025-496X (ISSN-L)
- 1560-7917
- PMC
- PMC8915403
- OpenAlex
- W4220665561
- Cited by
- 78
- References
- 24
- Citations by year
- 2025: 1 · 2024: 12 · 2023: 18 · 2022: 46 · 2021: 1
- FWCI
- 9.41
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- Eurosurveillance (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by)
- University of Southern Denmark Research Portal (University of Southern Denmark) (publishedVersion, cc-by)
- Funders
- Statens Serum Institut
- Topics
- Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
- Physical Sciences › Mathematics › Modeling and Simulation › COVID-19 epidemiological studies
- Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
- Keywords
- SARS-CoV-2, Omicron variant, molecular epidemiology, phylogenetic analysis, viral mutations, Denmark, capital region
- MeSH terms
- COVID-19, SARS-CoV-2, Denmark, Humans, Phylogeny, Molecular Epidemiology
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
