Hey, let's talk about the dog flu vaccine. Jazz actually was given it in the shelter when she was a pup.
My impression is that this vaccine is the same each year. Does anyone know for sure?
Being a vaccine for a viral disease, it should give prolonged protection for the actual strain that it covers, so why do they require it annually? Mind you, it's not a vaccine I would ever give my dogs, though I understand why a shelter might give it.