Increased circulation of GII.17 noroviruses, six European countries and the United States, 2023 to 2024

Published on 26 September 2024 Updated on 10 August 2026

We report an increase in GII.17 norovirus outbreaks and sporadic infections of acute gastroenteritis in Austria, Germany, France, Ireland, the Netherlands, England and the United States during the 2023/24 season. A decrease in GII.4 coincided with GII.17 prevalence increasing to between 17% and 64% of all GII detections. Overall, 84% of the GII.17 strains clustered closely with strains first reported in Romania in 2021 and two new sub-lineages were identified. Norovirus surveillance and molecular characterisation should be prioritised this winter.

Author(s): Chhabra Preeti, Wong Shan, Niendorf Sandra, Lederer Ingeborg, Vennema Harry, Faber Mirko, Nisavanh Athinna, Jacobsen Sonja, Williams Rachel, Colgan Aoife, Yandle Zoe, Garvey Patricia, Al-Hello Haider, Ambert-Balay Katia, Barclay Leslie, de Graaf Miranda, Celma Cristina, Breuer Judith, Vinjé Jan, Douglas Amy

Publishing year: 2024

Pages: 2-7

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