title: Observations on field trials with an experimental attenuated Marek's disease virus vaccine.
mesh_terms: D000818:Animals; D000956:Antigens, Viral; D001353:Avian Leukosis / Q000517:prevention & control*; D002645:Chickens; D004531:Eggs; D006566:Herpesviridae Infections / Q000662:veterinary*; D007273:Injections, Intramuscular; D008380:Marek Disease / Q000276:immunology / Q000517:prevention & control; D014765:Viral Vaccines
chemical_list: D000956:Antigens, Viral; D014765:Viral Vaccines