Genetic evolution, phylodynamics, geographic spread of H9N2 avian influenza viruses in China from 2014 to 2025: an increasing potential zoonotic risk
A large-scale sequence analysis of the genome of Chinese H9N2 viruses from 2014 to 2025 using public databases and laboratory isolates identified 52 different genotypes in 1,591 H9N2 viruses, including 4 previously recognized genotypes (G6, G57, G58, and G68) and 48 newly defined genotypes (G118–G163) in this study.