WhyNoDonuts

Chips that can be injected in a fluid, and nanobots like you describe, are insanely expensive. It would require teams of people to monitor a household. It actually is very complicated in practise. Your idea is currently science fiction based on some new science.

Wouldn’t it be easier using existing technology to turn everyone’s car and truck off with those satellite theft prevention devices? Or maybe you should worry about the people shooting out transformers and diabling out key electrical transfer points, dams, or nuclear stations. But you’re worried about vaccine robots. Hell, the vaccine itself could be poison, but you’re worried about the borg.

ComradeUseless

Or release nanomachines too to do it. What toxin could do that task though? like cyanide? I dont know much bout these things.

TauCeti

It only takes, for example, one nanogram (a billionth of a gram) per kilogram of body mass of botulinum to kill a human being.

ComradeUseless

That sounds promising if its economically viable for them to produce enough of it for billions of people. If it was that small, how can you really even see that or know if something has it or not...

KEVDOG77

I'm not getting a vaccine

Time4puff

Kind of like Logan's Run hand lights. It'll determine who gets to live.

NakedWarrior

Except all the whites go to carousel this time.