A programming supervision enabled the debuff to spread beyond the site of this Hakkar boss struggle and into the world at large. Hunter characters can summon and discount pets to wow classic gold fight in their side at will. Once ignored, all the consequences on the pets have been paused until it is known as back . In consequence, the critters could contract Corrupted Blood during the boss fight, vanish then display the symptoms again elsewhere in the world map if they were summoned. There it would spread to other pets and players which came in contact with them.
Cities such as the dwarven town Ironforge and orc town Orgrimmar were overrun within hours. Non-playable characters, who could not die due to special coding, could also catch the effect, meaning any participant who passed by them could receive Corrupted Blood.
Once word got out, players searched frantically for information about what was going on.
"The entire world chat would burst any time a city fell," says Nadia Heller, an ex-World of Warcraft player whose persona lived through the incident. "We kept a close attention not just on our guild chat but on world chat too to determine where not to proceed. We did not need to catch it."
The spread of Corrupted Blood, and cheap wow gold classic also the player's behavioral changes to it, caught the interest of epidemiologist Dr. Nina Fefferman, that was a World of Warcraft player at the time of this incident. In 2007, the two published a paper that detailed their findings, such as complex models of human behavior in a pandemic. Fefferman says the incident has helped inform her current research into predictive modeling about covid-19.