Originally Posted by aynelson
There is no way you can be "immune" to a vaccine. Your doctor gave you advice that really makes no sense.
I think what she means is that some will get an illness regardless of vaccination...which is true. There are so many strains of illnesses, that even when you vaccinate for several, you aren't 100% guaranteed that the animal won't get the illness, because a different strain can crop up and the horse's immune system isn't prepared for it. It makes vaccinating a crapshot at best, sometimes, because you never will know when a virus will make a 'jump' and attack the horses as a closely related but different strain than the animal is vaccinated for.
To the OP, I am so sorry that you lost a great horse...many hugs!!!