Introduction and Rapid Spread of SARS-CoV-2 Omicron Variant and Dynamics of BA.1 and BA.1.1 Sublineages, Finland, December 2021

Hanna Katariina Vauhkonen, Phuoc Truong, Ravi Kant, Ilja Plyusnin, Mert Erdin, Satu Kurkela, Hanna Liimatainen, Niina Ikonen, Soile Blomqvist, kiirsi Liitsola, Lindh Erika, Otto Helve, Hanna Jarva, Raisa Longinov, Aino Palva, Tiina Riitta Hannunen, Sari Hannula, Mikko Perry, Paula Kauppi, Antti VaheriTarja Sironen, Maija Lappalainen, Carita Savolainen-Kopra, Teemu Smura, Olli Vapalahti

Research output: Contribution to journalArticleScientificpeer-review


Multiple introductions of SARS-COV-2 Omicron variant BA.1 and BA.1.1. lineages to Finland were detected in early December 2021. Within 3 weeks, Omicron overtook Delta as the most common variant in the capital region. Sequence analysis demonstrated the emergence and spread through community transmission of a large cluster of BA.1.1 virus.

Original languageEnglish
JournalEmerging Infectious Diseases
Issue number6
Pages (from-to)1229-1232
Number of pages4
Publication statusPublished - Jun 2022
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 11832 Microbiology and virology

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