Demon Fever

Demon Fever (魔鬼热) is an ailment that exists in the New World.

Overview
A cursed disease that may be unique to the undead. A highly infectious plague, that spreads by an airborne vector, and which can’t be treated by [Cure Disease].

Trivia

 * Bets Ku Proun believed that the Undead Disaster was caused by a cursed disease similar to Demon Fever.