Cities like the dwarven city Ironforge and orc town Orgrimmar were overrun in hours. Non-playable personalities, who couldn't die due to classic gold wow particular coding, could also catch the effect, meaning any player who passed them could receive Corrupted Blood.

Once word got out, players searched frantically for news about what was happening.

"We kept a close attention not only on our guild chat but on world chat as well to see where not to proceed. We didn't want to catch it."

The spread of Corrupted Blood, and the player's behavioral changes to it, caught the interest of epidemiologist Dr. Nina Fefferman, that was a World of Warcraft player in the time of the incident. Fefferman achieved to her colleague Dr. Eric Lofgren. In 2007, both published a paper which detailed their findings, including complicated models of individual behavior during a pandemic. Fefferman says the episode has helped inform her current research into predictive modeling around covid-19.

"What I do is research all the elements of buy wow gold classic infectious disease outbreaks which help us prepare for pandemics," explained Fefferman, a mathematical biologist. "We really saw the complete variety of behaviors we find in the actual world reflected in the player characters throughout Corrupted Blood."