The effect of early natural exposure to Marek's disease on immunization of breeders by vaccination.
D000818:Animals; D000917:Antibody Formation; D001353:Avian Leukosis / Q000276:immunology*; D001354:Avian Leukosis Virus / Q000276:immunology; D002642:Chick Embryo / Q000276:immunology; D002645:Chickens; D005260:Female; D008431:Maternal-Fetal Exchange; D010523:Peripheral Nervous System Diseases / Q000276:immunology; D011201:Poultry Diseases / Q000276:immunology*; D011247:Pregnancy; D013997:Time Factors; D014765:Viral Vaccines / Q000008:administration & dosage*
D014765:Viral Vaccines