The Crazies

The other day I was watching the movie The Crazies directed by Breck Eisner and it made me start to think. What would happen if there was actually a deadly virus or toxin that makes everybody crazy or if theirs a outbreak on a deadly contagious disease? Would the government just try to contain the virus and administer a vaccine or would they take more drastic matters and just eradicate anything that was infected? Im  pretty sure that theirs a plan or a procedure the government would take for something like this and was wondering if anybody knew a little more information on this. I would love to read some comments if anybody knows a little more or has any thoughts