First cases of SARS-CoV-2 BA.2.86 in Denmark, 2023

We describe 10 cases of severe acute respiratory syn-drome coronavirus 2 (SARS-CoV-2) variant BA.2.86 detected in Denmark, including molecular character-istics and results from wastewater surveillance that indicate that the variant is circulating in the country at a low level. This new variant with many spike gene mutations was classified as a variant under monitor-ing by the World Health Organization on 17 August 2023. Further global monitoring of COVID-19, BA.2.86 and other SARS-CoV-2 variants is highly warranted.