Good post. There are couple of points I would like to make.

First, the cost is around $ 400 for three shots. Many of the insurance companies are paying very less money to the doctors above the cost of vaccine, hence it is not viable for small practices to carry it.

Second, while there is little doubt, based on available evidence that the vaccine is effective, making it mandatory might harm the long term prospects. It just gets a lot of worked up from the religious right to people who pathologically hate the pharma industry. In the past F.D.A recommendations have led to vaccines being made mandatory only after a few years. I completely agree that waiting for few years might harm the child and if I was a a parent I would have definitely gone for vaccination. However, in the largely political and partisan debate, perhaps it makes sense to wait a little. Ultimately, my worry is that the debate would move away from the vaccine and focus on externalities resulting in so much opposition to the vaccine that it would extremely difficult to implement as a public health program.