US gov had a crap load of studies that said agent orange was safe to use also in Vietnam. I also liked "love canal" there were no adverse problems living on the chemical dump. For every study there are 5 others that conflicts.   The decision should be with the parents. You get a flu shot, they tell you there is a risk of getting the flu although small ... let the parents decide. Nothing is fully safe don't care what it is, nor are the shots fully safe, they are not regardless of study. My grand nephew spent a week in the hospital 2 months ago. He is 15 months old ... reaction to the vaccine. He is fine home and playing but something in the shot caused a reaction. It is documented and the CDC was notified by the hospital. NO there is no completely safe vaccine