I had no vaccines ever. My father was a chiropractor, and then went back to school and became a Naturopathic Physician. None of us had vaccines, and he was especially horrified about the polio vaccine, so I didn't get that either, at a time when polio was rampant. I did get lots of childhood illnesses but they didn't scar me for life, and I am now extremely healthy.
Growing up also as a JW, I got the two philosophies mixed up and thought for years that we didn't get vaccinations because "it was against our religion". I know I told people that too.
Chelation therapy (from what I understand of it) can undo some of the damage done by vaccinations and exposure to other harmful elements.
If you feel your child (and even yourself - the diet talked about has also had alot of positive effects in the treatment of alot of auto-immune disorders such as fibromygalia, diabetes, etc), then the testing from the above mentioned laboratory is a wonderful step to make. The "poopy test"' (as I like to call it) will show whether or not the child's digestive system is having a hard time processing the glutens & caisens so prevalent in the american diet. The harmful elements are able to jump the blood/brain border, thus further aggrevating some symptoms.