I'm with Red ACD..
The AAHA recommends puppy shots, and one year boosters and then three year protocol. I may titer in 08 when three years is up..
There was a guy on a board I'm on. Thought no shots were good. two years later his belgain, and the sister to his dog both caught parvo at likely the schutzhund club they both go to. His dog survived just.. sister dog died.
He's now doing the recommended shots. Crappy way to figure it out though.