title: Dynamics of immunomorphological changes in the organs of chickens after immunization with BPL vaccine and after challenge with fowl plague virus.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002645:Chickens; D009980:Influenza A virus / Q000276:immunology*; D007783:Lactones; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000662:veterinary*; D011201:Poultry Diseases / Q000276:immunology*; D014611:Vaccination; D014612:Vaccines
chemical_list: D007783:Lactones; D014612:Vaccines