Omnicillian was more of a concept than a product in the naughties. An investors shorthand for the ultimate cure-all, omnicillian would eventually come into existence through a triage of MEMS, quantum computing, and open sourced DNA code, rather than some biologically synthesized injectable serum. Fear of bioterror spurred on investors eager to fund research that might ease that fear, and a host of high-tech startups capitalized on this situation.
With the publication of the human genome sequence, this research was being carried out not only in well-funded private sector labs and university programs, it was also being explored by a new generation of biohacking hobbyists. Some theorized that with the proper knowledge, a person could program Omnicillian to rewrite any bit of DNA you desired. Genetic hacking, the ultimate body modification , quickly found converts within the global pierced and tattooed subculture. Naturally, this did begin as an extremely small, close-knit group; only a relatively few people possessed both the technical knowledge and the proper equipment to do this kind of research on their own, but soon they represented the outer technical elite of a growing body of the curious once the wetweb's infrastructure became ubiquitous.
Those applications were years on down the line though when Omnicillian was first developed. By all accounts it wasn't ready for human trials, never would have been greenlighted as such were it not for the outbreaks. Increasing concerns about the spread of brain fevers and respiratory ailments that left scores dead and hundreds of thousands sick for weeks led to the touting of omnicillian inoculation as a cure-all. Lauded as the end of disease, the injection of billions upon billions of animalcules destined to create a new type of gland that could pup out bioformed MEMS carrying within them a DNA source that they used as a blueprint to seep through the body replacing the innards of any encountered viral shell, lengthening telomeres, and rejuvenating neural tissues.
Dr. Zagreus's magic cure-all was a DNA-based computer that used the host body's DNA as a reference point from which to eliminate the guesswork in cellular regeneration. Eventually, every cell of the body would be rebuilt from the DNA up over a period of months rather than the normal seven year cycle. Invasive bacteria is carried through the cells to the skin's surface, a pussy sweating that passes after the first few weeks.
There was fear that this was the end of a species (though some saw it more as a hope.) Fear that this gland, manufacturing nanites, would adhere eternally to one's structural genetic matrix, passing on to descendants.
Human 2.0, people were calling it.