Letter to the Editor: Knowledge gap in assessing the risk of a human pandemic via mammals’ infection with highly pathogenic avian influenza A(H5N1) Nishiura, Hiroshi and Kayano, Taishi and Hayashi, Katsuma and Kobayashi, Tetsuro and Okada, Yuta, Eurosurveillance, 28, 2300134 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.9.2300134