I recommend this article as a "must read"!
We all want to do the very best for our pets, and I can highly advise you to do your own research, and not just listen to your vet alone concerning your pet's health and care. Acquire your own knowledge, for you to be in control over the welfare of your pet. It may not only be better for your pet, it may save you a lot of money,( and grief) over the long run.
I will just cut a couple of slices out of the article, so you get an idea about the subject.
3 Puppy Vaccination Mistakes: Too Early, Too Often, Too Much
The result of these errors in judgement is that puppies receive more vaccines than they need – lots more. They receive a parvovirus component in their first combination vaccine when that part of the vaccine has little chance of working. Most puppies are protected against distemper with the first vaccine if not given too early, yet most puppies are given a combination vaccine containing distemper at 12 to 16 weeks and older – when they really only need the parvovirus.
You can read the entire article here.