Bhat S, James J, Sadeyen JR, Mahmood S, et al. Co-infection of chickens with H9N2 and H7N9 avian influenza viruses leads to
emergence of reassortant H9N9 virus with increased fitness for poultry and a
zoonotic potential. J Virol 2022 Jan 12:jvi0185621. doi: 10.1128/jvi.01856.
PMID: 35019727