Is there any problem using different brand WNV vaccines? A local vet
says you need to use the same brand when giving the initial and subsequent
booster. How about for the annual.... does it also have to be the same as
what has been given the year before?
I am sure the pharmaceutical company will tell you the answer that makes
them the most money.
By the way, how many weeks after the initial shot does the booster have to
be given?
