The live vaccine is able to travel through the body in the same sequence as the naturally occurring virus would, creating immune stimulation in the same way the street virus would. (vin.com)
A veterinary journal also found that it protected against immune stimulation across a variety of animal species. (wellnessmama.com)
In general, live virus vaccine is preferred as the most thorough immune stimulation will occur with it, but there are some circumstances where killed is better. (vin.com)