title: Cross-protection between hardjo and balcanica.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D006224:Cricetinae; D007922:Leptospirosis / Q000517:prevention & control / Q000662:veterinary*; D012376:Rodent Diseases / Q000517:prevention & control*
chemical_list: D001428:Bacterial Vaccines