Aug 27, 2015
Corrupted Blood - World of Warcraft - 2004 (Incident from a 2005 update)
“Unlike previous ‘virtual plagues’ that had been officially planned, this was a local effect that went out of control—a naturally occurring virtual outbreak. In the words of one player, ‘What happened next was just plain weird.’”
- Ran D. Balicer, Modeling Infectious Diseases Dissemination Through Online Role-Playing Games
http://journals.lww.com/epidem/pages/articleviewer.aspx?year=2007&issue=03000&article=00015&type=abstract