Maybe there is no need to complicate things by thinking about nano tech and advanced technology in the jabs. Maybe this one is just to give as many people cancer as possible because that is a type of death which they can easily deny. Steadily increasing rates of cancer, "could be anything" they'll say.
Moreover, with Earth's weakening magnetic field during the Pole shift, that will theoretically bombard Earth with far more space radiation than people are used to. It could be a one two punch, weakening people's immune systems and then kill them off with cancer. Not everyone of course, but who knows, perhaps hundreds of millions or more.
Maybe the full roll out of the more advanced tech comes in response to this first wave of death. Who knows and hard to say, but just thought I'd speculate here.
Or, perhaps a fear campaign turned into a profit potential. Strike while the iron is hot by selling whatever crap they could throw together in a hurry. Plus big pharma got the benefits of large scale testing for a previously failed type of treatment, governments got more power and control. It's the unknown that has me concerned the most. There
There could be simple explanations for everything that don't go deep at all. I don't trust because I know they don't care about anyone but themselves.