I have concerns for medical reasons for delivery via egg protein because of serious allergy issues. My youngest son was moved to the specialized formula because my wife was down to eating Lamb, Apples, Rice and Peaches because that was all he didn't react to that we could find. My older son has been tested and is highly allergic to egg protein, soy, peanut, pea, avocados and bananas (that is not counting foods he never has eaten out of concern of allergies). So every vaccine that has that carrier causes them to react, and they have to go on a regiment of medicine to counter the side-effects.
I also have concerns for theological reasons regarding the vaccines derived from two fetuses aborted for medical reasons in the 60's. As I stated before, I accepted the vaccines because I feel at least then we are honoring the sacrifice.
The schedule that we are using is a vaccine a month as long as there is no serious reactions. Under the advisement of the physician, we delayed some vaccines in order to give time for their bodies to become stronger before administering them. Ultimately it is something that you need to discuss with their doctor's, and longer than the 15 seconds they usually want to give you. We are blessed by finding a great physician that has severe food allergies and understands the fears and concerns we have, and goes above the board in both educating and advocating for our children.