In other words, while the A.A.P., the C.D.C. and the I.O.M. are firm in their stance that following the recommended vaccine schedule is the safest and most effective way to prevent childhood diseases in individuals, one powerful argument in favor of following the recommended schedule is based on the needs of the community as a whole.
Just as children are immunized both for their own protection, and to decrease the likelihood that those too young or too sick to be immunized will be exposed to diseases they are even less able to handle, children are also immunized on a particular schedule to give us the best shot at catching and eliminating the rare side effects of the vaccinations themselves. Full story here.