In 2011, UN peacekeeper force during a mission to track down unlawful weapon trafficking stumped upon a small village in Africa that was attacked by unknown creatures in the form of oversized rats. After disposing the rats, the survivors were moved to a research facility where they underwent examination. While at the research facility, the survivors began to show symptoms of necrotizing fasciitis. When further examined, the researchers found an unknown type of hook worm. It was classified as "Alpha-worm". Conventional medicine had no effects on the patients. The worms deformed the victims, but the infection increased the strength and resilience of the people infected.

The infected eventually broke free and attacked the researchers. A few researchers survived, only to find that they had been infected as well. Due to a fear of an outbreak, the military assaulted the facility and destroyed all traces of the infected and the Alpha-worms.