 Many recent protocols indicate that vaccines should be given in specific areas in order to ease identification of which vaccine caused an adverse reaction and ease removal of any vaccine-associated sarcoma.Although these protocols were initially designed for cats, some similar protocols are likely to be developed for canines, as well.In North America, veterinarians adopted the practice of injecting specific limbs as far from the trunk of the body as possible, for example the rear "right" limb "for rabies".