This what New York did but only after many many people were sicken and many died of typhoid caused bu 1 person named Mary.
http://en.wikipedia.org/wiki/Typhoid_Mary
Think of that nurse flying around or obama sending thousands of Americans without protection to Africa and refusing to stop travel from those infected countries.
Almost 30 years in isolation! There are some who suggest that the new W.H.O. 42 days isolation for Ebola is too much to bear...