Reasoning of such aside, when you have credit cards, smartphones, etc. which do not require a microchip to know everything about you (ever had that odd feeling that when you talk about something near your phone with android, you get some change on your display of adds powered by google adds?), its not impossible tech wise with the new tech roll out. I just do not see a real benefit for the cost. Why would I ever be bothered to track joe the geek or bunny the pothead?
You are much better at 'controling' population by making it fragmented and divided wtih no real common values, stupid on average, egocentric and individualistic, and gamifying the life (followers, likes, etc. ) where low IQ behavior is rewarded more than the high one, and you have followers of stupid believing they are right, because there are a lot of them, so they have to be right (confirmation bias) - that's a whole different topic though, so lets stick to the vaccines and COVID.
That said, (trade?) wars over vaccines! When?!