Test Subject
Fortunately for Jill, luck was on her side. The apparatus monitoring her vital signs detected some abnormalities. Something was happening inside Jill's body, and Wesker's curiosity was piqued. Further investigation showed that a mutated form of the NE-T virus was still inside her body. It was a remnant from her infection in Raccoon City. The cure she was given was supposed to have eradicated all traces of the virus in her body, but instead it caused the virus to go into a dormant state. Her extended period in a cryogenic sleep somehow reactivated the virus. Shortly after being reactivated the NE-T virus completely disappeared from her body, but it left something else in its place. Wesker found that Jill's body now contained powerful antibodies to the virus.
All those years the NE-T virus was inside her body forced it to develop a defense system that was nothing short of miraculous. This discovery would help further Wesker's ambitions. The development of the Uroboros virus, the centerpiece of the Uroboros Plan, had proven to be quite difficult. The Uroboros virus developed from the "Stairway to the Sun" flower proved to be too poisonous to humans to be of much use. Instead of spurring the next step in human evolution, it only invited death. Wesker theorized that using Jill's antibodies could make the virus less poisonous. He kept Jill alive solely to produce antibodies for his research.
