Often this topic makes me think of some of the fictional technology present in Deus Ex, released back in 2000, e.g:
> The cells of every major tissue in the body of a nano-augmented agent are host to nanite-capsid "hybrids." These hybrids replicate in two stages: the viral stage, in which the host cell produces capsid proteins and packages them into hollowed viral particles, and the nanotech stage, in which the receiver-transmitter and CPU are duplicated and inserted into the protective viral coating. New RNA sequences are transmitted by microwave and translated in to plasmid vectors, resulting in a wholly natural and organic process.
> The cells of every major tissue in the body of a nano-augmented agent are host to nanite-capsid "hybrids." These hybrids replicate in two stages: the viral stage, in which the host cell produces capsid proteins and packages them into hollowed viral particles, and the nanotech stage, in which the receiver-transmitter and CPU are duplicated and inserted into the protective viral coating. New RNA sequences are transmitted by microwave and translated in to plasmid vectors, resulting in a wholly natural and organic process.