Assia Allaoui, Karina Bachtarzi, Lilia Belkacem, Mohamedsalah Beguiret 2022. Comparative Study of the Efficiency of the Inactivated H9n2 Vaccine against Avian Influenza in Broiler Chickens. Pakistan Journal of Medical & Health Sciences. 16, 09 (Nov. 2022), 363. DOI:https://doi.org/10.53350/pjmhs22169363.