I dunno if I'm just the sick one but I am kind of bummed that the health issues cant progress beyond symptoms. Having to actually be a caretaker for these feedees and juggling keeping them fed/alive seems like it would be a good mechanic especially when you get more feedees (and toss the more extreme feedists a bone while youre at it)
Although I won't include death in the game, I'll be expanding the health system in a mini-update that I'll release before the next big one.
This could work like you describe, but the threat would be girls being hospitalised rather than dying. Maybe the symptoms could worsen and become harder to manage the heavier the girls get.