A week after the outbreak, it forced Blizzard to wow classic gold restart every WoW server to prevent it from spreading out of control.

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The infection originated from Hakkar the Soulflayer -- the boss of this very initial 20-player raid Blizzard released. Hakkar would cast Corrupted Blood on gamers and it might damage them for approximately ten minutes. Players would spread the impact to other people if they got too near those infected. After the 10 seconds were done, or players completed the boss battle, the harmful impact was supposed to finish. Only it didn't.

A programming oversight enabled the debuff to disperse beyond the website of this Hakkar boss struggle and into the world at large. Hunter characters may summon and dismiss pets to fight at their side at will. Once dismissed, all the effects on the pets are paused until it is known as back out again. In consequence, the critters would contract Corrupted Blood during the boss fight, disappear and then exhibit the symptoms again elsewhere in the world map when they were again summoned. There it might spread to other players and pets which came in contact with them.

Cities such as the dwarven town Ironforge and buy classic wow gold orc town Orgrimmar were overrun within hours. Non-playable personalities, who could not die as a result of particular coding, could also catch the effect, meaning any participant who passed by them could get Corrupted Blood.