The Rex Research Institute is an organization of doctors and scientists who were creating various types of medicine in an attempt to prolong life. Gradually, they changed their objective into trying to find a way to make humans immortal. Due to their continuous experiments on living things, their plans backfired and had instead created a dangerous virus, dubbed the Rex Virus. This caused humans to turn into the undead, the zombies. The zombies managed to escape from the lab, during Chaos chapter, and started infecting the others. This was also the place where Jennifer was captured and kept alive as a human experimental subject.
The Rex Research Institute is an organization of doctors and scientists who were creating various types of medicine in an attempt to prolong life. Gradually, they changed their objective into trying to find a way to make humans immortal. Due to their continuous experiments on living things, their plans backfired and had instead created a dangerous virus, dubbed the Rex Virus. This caused humans to turn into the undead, the zombies. The zombies managed to escape from the lab, during Chaos chapter, and started infecting the others. This was also the place where Jennifer was captured and kept alive as a human experimental subject.