How far should the government go in isolating people with an infectios diseases? Should the army be involved?

I feel that the Government should be doing everything possible to prevent any infections/diseases from spreading. I would say go as far as they need to, as in passing out certain laws that the people with those infections/diseases can't be around others, unless there infection/disease isn't all that serious as others. I really don't think that the army has to do anything.