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.
I think there are multiple levels here...
the give everyone cancer angle sounds palusible, particularly when you consider the population numbers defined in the GA guidestones..
Additionally, they really don't care who dies. In other color revolutions it's the early dissidents who helped throw over the government that are killed by the new government. "If they did it once, they will donit again".. granted it's not over, but my point is bodies dont matter to them
Pharma saw a chance to use the pop as guinea pigs, this is why when you went for a shot they had to check "the system" to see what batch you would get. Then they could later track results.. death records are easily searched.
Ultimately i think it was a let's try and see, with multiple goals.