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

I thick if there is a large infective disease happen,and a lot of people are sick.The government should isolate  all of them far away from the health people.May be 50 miles away from the big cities.To prevent all of the other people health,it's very important.Also,l thick army should involed,too.They should ensure the infected people's safe.They need to make them not to attack other people,too.