A programming oversight enabled the debuff to disperse beyond the website of this Hakkar boss struggle and into the world at large. Hunter characters can summon and discount pets to wow gold classic fight at their side at will. Once dismissed, all the consequences on the pets have been paused until it is called back out again. In effect, the critters would contract Corrupted Blood during the boss fight, vanish then exhibit the symptoms again elsewhere in the world map when they were summoned. There it might spread to other players and pets that came in contact with them.
Cities like the dwarven town Ironforge and orc city Orgrimmar were overrun within hours. Non-playable personalities, who could not die due to special coding, would also catch the impact, meaning any player who passed by them could get Corrupted Blood.
Once word got out, players hunted frantically for information about what was happening.
"We kept a close eye not just on our guild conversation but on world chat as well to determine where not to go. We did not need to catch it."
The spread of Corrupted Blood, and the player's behavioral modifications to it, caught the attention of epidemiologist Dr. Nina Fefferman, who had been a cheap wow classic gold player in the time of the episode. In 2007, the two published a paper that detailed their findings, such as complicated models of individual behaviour in a pandemic. Fefferman says the incident has helped inform her current research into predictive modeling around covid-19.