Like everything else, this topic worried me so I did some research. Of all the things I read I think Dr. Sears book, The Vaccine Book is most in line with my views on the issue and does a really good job providing you with the information needed to make your own decisions about vaccinations.
For Colin and any future children we will be following an alternative vaccination schedule that still gives all the 'required' vaccines to children in time for school admission but spreads them out a little bit more so as not to give 4-5 vaccines in one office visit. The AAP lists 5 vaccines that Colin should get at 2months old HIB, Rotavirus, DTaP, Polio and Pc, on the schedule we will be following he will get 2 of these tonight, 2 in a few weeks and Polio when he is two.
In general there are three types of controversial ingredients:
preservatives- like aluminum and mercury
human and animal parts.
The book outlines all the potential issues with each of these ingredients and outlines a plan to minimize the risks whether they are real or not! I really recommend this book to anyone who is nervous about the hazards associated with the number of vaccines children are required to get.
The downside of the alternative schedule are more visits to the doctor (and more co-pays) and potentially more individual shots since some of the combo shots are broken up into their individual components. For me, this is a small price to pay for a healthy child and peace of mind.