[NicoJuicy]

Aren't nanobots a thing: https://en.m.wikipedia.org/wiki/Nanorobotics ?

Can't the human body be used as an antenna?

Just saying, A fool can ask more questions than seven wise men can answer.

[Taniwha]

not really a practical thing (maybe some day, maybe never) - anything can be an antenna, not necessarily a good one, especially if you want some output actual power