Simultaneous alteration of residues 279 and 284 of the VP2 major capsid protein of a very virulent Infectious Bursal Disease Virus (vvIBDV) strain did not lead to attenuation in chickens. - Abdeljelil, Nawel Ben; Khabouchi, Neila; Kassar, Selma; Miled, Khaled; Boubaker, Samir; Ghram, Abdeljelil; Mardassi, Helmi (Virology Journal, 2014)