What are the dangers of vaccines?

I have a dog that will be 1 on Thursday and I've been looking into this for months now. Most veterinary hospitals now recommend that you get the puppy shots and the rabies then boosters at 1 then nothing again for 3 years unless your state mandates an annual rabies shot. I am going to go by this and I have with my past dogs cause I had a feeling that all these shots are not good for dogs. You can get your dog tested every year also to see immunity to these diseases. I think that this is going to be the norm soon. Most vets know that there is at least a 3 yr immunity but they just want to get the dogs in for their check ups so people won't bring them in for the checkups but will bring them in for shots. So the vets give the shots to please the people. Look it up on any veterinary school website. This is going to be the new wave of the future.