Infectious bursal disease (IBD) of chicken is one of the seriously infectious diseases that
damage poultry industry.Vaccination of routine vaccines is the major means for control of
IBD. Though, they have some disadvantages inevitably, for example: inactivated vaccines
could result in potential infection due to survival viruses; all attenuated vaccines do harm to
chicken bursas; the wide-ranging use of attenuated vaccines could hamper the control of
inf...
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