The Problem With Quarantines

As demonstrated in this article, the problem with quarantining infectious people is that they don't stay put.  During a highly infectious disease outbreak, public health officers have the power to shut down public places/gatherings and confine people to their homes/other locations.  But short of stationing one guard per confined person, keeping people from breaking quarantine and going out among the public, possibly spreading disease, is virtually impossible to do.  It's a very selfish act to put your own wants ahead of public safety but there are plenty of people who do this (examples here, here, and here) so before, during, and after an infectious disease outbreak, you are pretty much on your own when it comes to ensuring your own safety, either by wearing PPEs or isolating yourself from others even if you aren't infected or under quarantine.