This was chewed over last year. One objection is that parents who don't have their children vaccinated may also not go to the doctor for everything, and conversely, parents who are vaccinating their kids are taking them to the doctor for everything. Thus the first group automatically has fewer visits, and the two aren't comparable. This report lacks that important data, because as they say in pediatrics, you don't have a child for a patient, you have a child with a parent: nothing happens without the parent's involvement.