Parents are asked to approve a variety of immunizations for their children. The various recommended vaccines are given beginning within a few months of birth and continue for the next dozen years and more. Some parents believe, without a scientific basis, that vaccines routinely harm children and that children are better off unvaccinated.
The United States Army has some experience with infectious disease. They keep records. The historical data for some diseases which we now prevent with a vaccine is available on line. Here are just some of the costs to the Army and the troops.