title: Specificity and age of appearance of natural immunity to MTV antigens.
mesh_terms: D000367:Age Factors; D000818:Animals; D000956:Antigens, Viral / Q000008:administration & dosage; D002464:Cell Migration Inhibition; D000939:Epitopes; D005260:Female; D007113:Immunity, Innate; D066298:In Vitro Techniques; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology; D008325:Mammary Neoplasms, Experimental / Q000276:immunology*; D008324:Mammary Tumor Virus, Mouse / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C
chemical_list: D000956:Antigens, Viral; D000939:Epitopes