title: Lack of resistance of adult mice to erythrocyte-borne Bittner virus.
mesh_terms: D000367:Age Factors; D000818:Animals; D004912:Erythrocytes; D005260:Female; D007109:Immunity; D007774:Lactation; D008297:Male; D008325:Mammary Neoplasms, Experimental / Q000276:immunology*; D008324:Mammary Tumor Virus, Mouse / Q000276:immunology*; D051379:Mice; D008854:Microscopy, Electron; D011247:Pregnancy