title: [Prevention of Marek's disease by various vaccination viruses following test infection at various ages, study of PD50].
mesh_terms: D000367:Age Factors; D000818:Animals; D002645:Chickens / Q000382:microbiology*; D008381:Herpesvirus 2, Gallid; D007115:Immunization Schedule; D008380:Marek Disease / Q000517:prevention & control*; D011201:Poultry Diseases / Q000517:prevention & control*; D014765:Viral Vaccines / Q000008:administration & dosage*
chemical_list: D014765:Viral Vaccines
vernacular_title: Marekschutz durch verschiedene Impfviren nach Testinfektion in unterschiedlichem Lebensalter, Untersuchung über die PD50.