The first stage of mammalian embryo development was the emergence of the spinal cord. For this reason, when a human fetus was observed under X-ray, it would always be in the shape of a meniscus. Zhang Lisheng's experiment of using the Gold Core shard to come in contact with the rat's spinal cord to induce a systemic genetic variation was in fact, a very simple and crude process of creating a man-made spiritual monster.
The 'stabilizer' used in the experiment was prepared from an anti-immunization agent that was needed to be injected in a human during organ transplantation. It was to minimize the interference of the immune system during the process of mutating the rat gene, the same went to the killing of the rat as well. The entire experiment has nothing to do with 'virology' at all.
