Such a sad tragedy for this family. Baby Ian died at 47 days old after having an allergic reaction to the Hep B vaccine.
All 50 states have some sort of vaccine exemption. Here in Utah, it is as simple as going to the health department, paying them $25 and signing a form saying you understand the risks you are taking by not vaccinating. You do have options to selectively vaccinate - or not at all.
I also recommend the books The Vaccine Book, by Dr. Sears and What Your Doctor May Not Tell You About Children's Vaccinations, by Stephanie Cave, MD. Both share the history of the disease, history of the vaccination, statistics of the disease, how effective the vaccination is and an alternate schedule for those that choose to vaccinate.
I am not anti-vaccine by any stretch. As with all things, I hope that everyone does their research and are making an informed choice. Know what you are injecting into your children. Once it is given, it cannot be taken back.