Interim 2022/23 influenza vaccine effectiveness: six European studies, October 2022 to January 2023 Kissling, Esther and Maurel, Marine and Emborg, Hanne-Dorthe and Whitaker, Heather and McMenamin, Jim and Howard, Jennifer and Trebbien, Ramona and Watson, Conall and Findlay, Beth and Pozo, Francisco and Bolt Botnen, Amanda and Harvey, Ciaran and Rose, Angela and European IVE group, Eurosurveillance, 28, 2300116 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.21.2300116