EDEN Syndrome

The EDEN Syndrome (症候群) is a mysterious disease in Digimon Story: Cyber Sleuth. It is said to be caught by heavy users of Cyberspace EDEN. Although it's said to be caused by brain nerves being overloaded with data due to illegally modded "s", as well as "Brain Jack" made by Hackers, its cause is unknown.

Digimon Story: Cyber Sleuth
The EDEN Syndrome has started spreading through the Real World. To prevent mayhem, infected patients are put in quarantine in special hospitals. A person dear to Yuuko Kamishiro has been infected by it, and she's working to save him or her.