title: Questions efficacy of cattle vaccines.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D008004:Licensure; D014481:United States; D014611:Vaccination / Q000662:veterinary*; D014612:Vaccines / Q000592:standards*
chemical_list: D014612:Vaccines