参考资料：
BBC Science Focus: Howarth, T. (2025). ‘It’s completely out of control’: Scientists warn bird flu could spark a human pandemic in 2026.
Ashoka University Research: Cherian, P. & Menon, G. (2025). Modelling a potential zoonotic spillover event of H5N1 influenza. BMC Public Health.
Global Virus Network: H5N1 on the Brink: Global Virologists Urge Immediate Action. (May 2025).
