WoW Death knight plague epidemic strikes Azeroth

Late last night, Azeroth bore witness to destruction not seen since its populace became the unfortunate victims of Hakkar's Corrupted Blood plague. Deathwing himself could not have foreseen the havoc unleashed by the unfortunate bug which allowed death knight players to cast their plagues, Blood Plague and Frost Fever, on friendly targets. The bug was hotfixed in the early hours of this morning.