here are a few links that are helpful in educating oneself about immunization.
The routine use of vaccines has created innumerable problems. The best defense against infection and disease is support of the body's natural immune system. A child's nervous and immune systems are not fully matured until after the age of 2. Breastfeeding supplies babies with antibodies that have been transferred through the mother's milk to compensate for this. Vaccinating babies can inhibit their immune systems from naturally developing the antibodies necessary to fight infection. Boost the immune system further by maintaining good nutrition on a daily basis. A happy, nurturing, stress-free home will also allow the body to use its energy reserves for fighting infection.
*from the Encyclopedia of natural healing
-siegfried gursche, MH with Zoltan Rona, MD, MSc & the ALive Research Group