Vaccines dramatically enhance the overall health and welfare of the fighting forces, and vaccines allow deployments to situations where disease is rampant.
It is a duty to the service and to fellow soldeirs to be vaccinated so you won’t get any of the diseases and won’t spread disease. That way the service can count on his readiness and the readiness of his unit without having to wonder about succeptibility to disease.
While some folks choose not to get vaccines, I think that choice is selfish for the reasons outlined above. The only reason people can refuse vaccines without a high risk of disease is because their neighbors all get the vaccines.
This kid should have gotten his vaccines a little at a time while growing up. Vaccines are safe.
The symptoms this man is experiencing must be his imagination. Vaccines are perfectly safe, especially the vaccines that use remains of aborted babies: http://www.cogforlife.org/vaccineListOrigFormat.pdf
As for getting a few at a time, that is usually not the option. As the mother of a three year old and and four month old, most vaccines are given together and there are no other options. For example, the MMR is only available as an MMR and not in single mumps, measles, and rubella shots. Finally, this man probably did get all of his vaccines and the Marines are giving him additional vaccines. It is my understanding that certain vaccines are given regardless of prior vaccination schedules.