University of Oulu

Lindh Erika, Smura Teemu, Blomqvist Soile, Liitsola Kirsi, Vauhkonen Hanna, Savolainen Laura, Ikonen Jaana, Ronkainen Jukka, Taskila Jyri, Taskila Tea, Sakaranaho Pertti, Savolainen-Kopra Carita, Vapalahti Olli, Ikonen Niina. Genomic and epidemiological report of the recombinant XJ lineage SARS-CoV-2 variant, detected in northern Finland, January 2022. Euro Surveill. 2022;27(16):pii=2200257.

Genomic and epidemiological report of the recombinant XJ lineage SARS-CoV-2 variant, detected in northern Finland, January 2022

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Author: Lindh, Erika1; Smura, Teemu2,3; Blomqvist, Soile1;
Organizations: 1Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
2Department of Virology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3HUS Diagnostic Center, HUSLAB, Clinical Microbiology, Helsinki University Hospital, Finland
4Northern Finland Laboratory Center Nordlab, Oulu, Finland
5Northern Finland Laboratory Center, Nordlab, Länsi-Pohja, Finland
6Primary Health Care Center City of Tornio, Finland and Center for Life Course Health Research, University of Oulu, Finland
7Länsi-Pohja Health Care District, Kemi, Finland
8Municipality of Keminmaa, Keminmaa, Finland
9Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
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Language: English
Published: European Centre for Disease Control and Prevention (ECDC), 2022
Publish Date: 2022-09-26


Recombinant sequences of the SARS-CoV-2 Omicron variant were detected in surveillance samples collected in north-western Finland in January 2022. We detected 191 samples with an identical genome arrangement in weeks 3 to 11, indicating sustained community transmission. The recombinant lineage has a 5’-end of BA.1, a recombination breakpoint between orf1a and orf1b (nucleotide position 13,296–15,240) and a 3’-end of BA.2 including the S gene. We describe the available genomic and epidemiological data about this currently circulating recombinant XJ lineage.

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Series: Eurosurveillance
ISSN: 1025-496X
ISSN-E: 1560-7917
ISSN-L: 1025-496X
Volume: 27
Issue: 16
Article number: 2200257
DOI: 10.2807/
Type of Publication: A1 Journal article – refereed
Field of Science: 3121 General medicine, internal medicine and other clinical medicine
Funding: This study was supported by the Academy of Finland (grant number 336490, 339510), VEO - European Union’s Horizon 2020 (grant number 874735), Jane and Aatos Erkko Foundation and Helsinki University Hospital Funds (TYH2021343).
Copyright information: © The Author(s) 2022. This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence and indicate if changes were made.