title: Challenges of vaccination.
mesh_terms: D000818:Animals; D000829:Animals, Domestic; D002417:Cattle; D003140:Communicable Disease Control / Q000379:methods* / Q000592:standards; D014380:Tuberculosis, Bovine / Q000517:prevention & control*; D014611:Vaccination / Q000592:standards / Q000662:veterinary*; D014612:Vaccines
chemical_list: D014612:Vaccines