title: An attenuated mouse leukemia virus. I. Origin and immunization.
mesh_terms: D000818:Animals; D002460:Cell Line; D004622:Embryo, Mammalian; D004899:Erythroblastosis, Fetal / Q000276:immunology / Q000382:microbiology; D005260:Female; D009052:Leukemia Virus, Murine / Q000276:immunology / Q000302:isolation & purification / Q000472:pathogenicity; D008223:Lymphoma / Q000276:immunology; D051379:Mice; D008809:Mice, Inbred C3H; D011247:Pregnancy; D051381:Rats; D011920:Rats, Inbred WF; D013154:Spleen; D014611:Vaccination; D014613:Vaccines, Attenuated; D014765:Viral Vaccines
chemical_list: D014613:Vaccines, Attenuated; D014765:Viral Vaccines