Hoseini H, Ziafati Kafi Z, Bakhshi A, et al. Comparative Histopathology and Immunogenicity of two Commercially available Infectious Bronchitis GI-13 Vaccine Strains in Broiler Chickens. J Poult Sci Avian Dis. Published online February 7, 2026. Accessed February 8, 2026. https://jpsad.com/index.php/jpsad/article/view/175