Dozier was in operation for over a century and was basically a juvenile lockup.
Up until about 1960, disease would have taken a toll on the inmates. That 100 are buried there over a period spanning a century and a decade is not surprising.
While disease could have claimed some lives, if you think all those kids died due to disease, you are mistaken. This place was a hell hole where kids were dumped into, even orphans who were abandoned by their parents or those who were incarcerated for rather minor crimes who were subjected to sadistic beatings, many of which resulted in deaths that the “school” never recorded, their family members never informed of their deaths or allowed to give them proper burials. This was not a “reform” school but a sadistic prison camp for children.
http://www.youtube.com/watch?v=DkBVfxmmQiQ