When illness sweeps through Wethersfield many of the townspeople form an angry mob and set out for hannah's house. Would you say that they are seeking justice ? if not what is it that they are seeking?

A fever sweeps through town.

Sixteen children and young people were stricken with the mysterious fever, and none of the familiar remedies seemed to be of any benefit.

The mab believes they are seeking justice, but it might be considered retribution..... they are grasping at straws looking to punish something (someone) they know nothing about. This is an example of mob mentality.... a different type of illness that overwhelms the masses. Unable to understand the illness.... they blame the woman they do not want to understand.