Live vaccine against infectious bursitis in poutry (Gumboro disease), lyophilized. Pharmaceutical form: Lyophilizate intended for oral and into conjuction application. Effect method: After vaccination, the immunity arises in one to two weeks and at broylers it lasts until the end of feeding period and at layers to the end of laying period. The chickens in andangered flocks should be revaccinated in one to two weeks and chickens in rearing should be revaccinated again at the age of seven weeks. Methods of immunisation: For oral application, prepare the vaccination solution only in such volumes that can be consumed within 2 hours from the moment of its preparation. For intra-conjunctival application, apply one drop of the vaccination solution into the animal`s conjunctiva bag and let it absorbed. Indication: For preventive vaccination against avian infectious bursal disease (Gumboro disease). Contraindication: It is not recommended to vaccinate ill fowls.