Regarding annual vaccination, from two top immunologists, Ron Schultz,
DVM and Tom Phillips, DVM, here is a quote confirming that it just
isn't so. The quote is from Kirk' Current Veterinary Therapy 1992:

"A practice that was started many years ago and that lacks scientific
validity or verification is annual revaccination.  Almost without
exception there is no immunologic requirement for annual revaccination.
Immunity to viruses persists for years or for the life of the
animal...... Furthermore, revaccination with most viral vaccines fails
to stimulate an anamnestic (secondary) response....  The practice of
annual vaccination in our opinion should be considered of questionable
efficacy..."

and this:  http://www.truthaboutvaccines.org/articles.html

We've never tried the nasal vaccines. Our indoor cats get their vaccines
 (just distemper and the "kitty cold" virus pack only) roughly about
every 3 years, sometimes longer. I think 3 years is recommended by the
vet but an article I read said some vaccines might even last 8 years.

Rhonda

I get the one for panleukopenia (distemper) and calici/rhino (upper respitory
diseases) every 3 years but no rabies or leukemia as mine are indoor.  I've
never had the nasal one done but was thinking about getting that one.