The College of Physicians of Philadelphia has a nice web site on vaccines, how they work, their history, etc., here:
http://www.historyofvaccines.org/con...ation-schedule.
Lots of interesting information.
Eta - all of the recommendations above are what I'd think about for
my children, in consultation with our family doctor who knows the kids. Anyone considering pursuing this should do so in consultation with their own physician. I am not making specific recommendations or prescriptions for anyone.