On Tue, 5 May 1998, Gary Kleppe wrote:

However, suppose immediatly afterwards the person goes right back out and
repeats the same actions (walking around outside without a coat in -60
weather, for example) that caused them to have the flu in the first place.
They get it again, only this time it's worse.

Akane in BE didn't do anything to caused her disorder.

She failed to seek treatment.