Authors’ response: Highly pathogenic influenza A(H5N1) viruses in farmed mink outbreak contain a disrupted second sialic acid binding site in neuraminidase, similar to human influenza A viruses Agüero, Montserrat and Monne, Isabella and Sánchez, Azucena and Zecchin, Bianca and Fusaro, Alice and Ruano, María José and del Valle Arrojo, Manuel and Fernández-Antonio, Ricardo and Souto, Antonio Manuel and Tordable, Pedro and Cañás, Julio and Bonfante, Francesco and Giussani, Edoardo and Terregino, Calogero and Orejas, Jesús Javier, Eurosurveillance, 28, 2300109 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.7.2300109