Chihantenseibyō

The Chihantenseibyō (地絆転生病, Earth-Bound Reincarnation Virus) is a virus capable of reanimating and rejuvenating the cells and bodies of deceased individuals, acquiring full functionality of the body and mind in the process. Used through the Pathogen Incubation Asylum, it was originally developed as a counter to the Summoning: Impure World Reincarnation. Despite the lack of a soul, the reanimated are able to utilize the distinct personalities the deceased possessed in life, though under the directive of the user's innate will. Because the bodies are in a perpetual state of restoration due to the virus, they are able to preform beyond their natural capacity, while near instantly healing any wounds they sustain. Reanimated individuals are able to make full use of any abilities they previously possessed and are even granted the user's knowledge thanks to the hive mind mentality of the virus itself.