So I have a 3 yr old and of course he has had all his shots until he starts school. He has never had any bad reactions to them or any suspect of autism.. however i do worry about the possibility with the new baby coming in march. My pharmacist actually said that I can request praservative free shots. They say its the persevatives in them is what can cause autism ( if it does at all) has anyone done this before? Did your doctor become annoyed that you kept requesting them?