Would it be possible for an NTR plugin, I wonder? Not that most of us have that kind of skill, but still. This mechanic bugs me like you wouldn't believe, alongside bonus exp., because I like having all my miis have nearly the same exp. points so that they level up at the same time.Given how linear the game's event flags seem to be, it seems that the only way to remove that godawful illness mechanic (Seriously. I'm a cleric who can literally raise the dead, but I can't cure a simple flu?) that gets introduced once your full party groups up would be to either mod the game itself or painstakingly manually cure everyone in the save editor every time. I'd be happy to be wrong on that, though.
That aside, fiction has always treated illness and injury as separate things, and if one can heal injuries, they usually can't heal sickness. Not that I'm defending it; it's kind of silly, imo. And does this mean they can't cure infection caused by said injuries? lol