Please read and discuss with your vet: http://skeptvet.com/Blog/2014/08/routine-vaccinations-for-dogs-cats-trying-to-make-evidence-based-decisions/ (excerpt below)
In general, I recommend following these guidelines for the initial vaccine series and the one year booster. I often cease vaccination for strictly indoor cats after that, however this involves a thorough discussion of the possible risks. If a cat escapes every once in a while, for example, they should certainly be kept current on rabies vaccination. And, of course, if there are legal requirements for rabies vaccination, these should be followed. Cats that visit other cats or have visitors or new cats come into the household, cats who attend shows or are boarded, and cats with owners who interact with cats outside the household may benefit from vaccination even if they are strictly indoors.
The risks of vaccination are generally similar in cats as in dogs, and very small, with one significant exception. The evidence is stronger for the development of a very serious kind of cancer, called a sarcoma, associated with some vaccines in some cats. The risk of this is still very low (reported to occur following as few as 1/10,000 doses of vaccine to as high as 36/10,000 doses), but it is a very dangerous and often fatal disease. Changes have been made in the vaccine used in cats to try and reduce this risk, but it isn’t absolutely clear if these changes have lowered the risk. This disease needs to be considered when making vaccination decisions for individual cats, and certainly we need to make a serious effort to avoid unnecessary vaccination. However, irrational fear of this disease is not a good reason to subject cats to unnecessary risk from equally serious infectious diseases by avoiding appropriate vaccinations.
