Survivors

[NorthernRaider]

In many well thought out PA novels and fictional stories you tend to find cities become uninhabitable for a few years, first the primary disease outbreak, then the weaker survivors peg out from secondary diseases like cholera and typhoid and starvation, then there is another major surge in diseases such as bubonic and pneumonic plague spread by the inevitable huge surge of growth in the rat population because their is so much to eat. Even the WHO reckon after a major pandemic in a city where all normal health systems fail you could see the place out of bounds for at least 4 years.