“…At present, IBD is still a global disease in the poultry industry. The circulation of IBDV was continuously reported in several geographical regions worldwide (Silva et al, 2013;Aliyu et al, 2016;Lupini et al, 2016;de Fraga et al, 2019;Le et al, 2019;Pikuła et al, 2020;Touzani et al, 2020;Thai et al, 2021;Wang et al, 2021;Bedasa et al, 2022;Feng et al, 2022). In Vietnam, prior studies on the change in genetic characterization of IBDV are scarce.…”