Emergence and Rapid Spread of a New Reassortant High Pathogenicity H5N1 Clade 2.3.4.4b Avian Influenza Virus in Nigeria. - Meseko, Clement; Zecchin, Bianca; Go‐Maro, Emilie Wolali; Dianati, Marta; Mkpuma, Nicodemus; Inuwa, Bitrus; Bakam, Judith; Olawuyi, Kayode; Gado, Dorcas; Giussani, Edoardo; Fusaro, Alice; Bortolami, Alessio; et al. (Influenza & Other Respiratory Viruses, 2026)