How to cure Harvey Fiddick?
Unfortunately, Harvey Fiddick is a typical optional character that cannot be helped. The protagonist's fate is not in Jonathan's hands, and we cannot help the sick person in any way. Dialogues and conversations with doctors will not help. The Harvey case should therefore be treated as a story with an open end.
The same is true of virtually every character - in fact, we have a real impact on the lives of the pillars of the neighborhoods and the few heroes we save when we carry out investigations. The role of the other inhabitants ends when all the clues have been discovered and all the investigations have been carried out.