Can it be cure?

Cure means to solve the problems causing the disease and thereby become well again.

cure (a treatment that removes the underlying cause of a condition)

the money that they get from walking for the cure goes towards find the cure. so in a way yes

There are references in some books about how to not get the Bubonic Plague or the "black death" Some say some robbers were going from house to house, stealing from the dead, and they never got sick....

It sounds like you answered your own question. if not ask again.