There are so many different side effects that can come of them....especially now with the rise of Autism and we just decided that the benefits of not vaccinating her are so much great!! We were both vaccinated as children and my husband developed MS, now they are trying to link this disease to the Hep-B shot, which by the way they try to give it to the babies in the hospital. (Hep-B is a sexually transmitted disease). Here is another great website. www.909shot.com