title: New approach to cattle vaccination.
mesh_terms: D000818:Animals; D002417:Cattle; D005822:Genetic Vectors; D014345:Trypanosoma / Q000276:immunology / Q000502:physiology*; D014611:Vaccination / Q000379:methods / Q000662:veterinary*; D019444:Vaccines, DNA / Q000235:genetics / Q000276:immunology*
chemical_list: D019444:Vaccines, DNA