When you get banned from a subreddit on Reddit. To me, that's proof that you are on the right path.

submitted by JustLookDontDismiss from (self.Rant)

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[–]JustLookDontDismiss[S] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Yes we do have nanotech it goes by smart dust is a generalized term used for it but what it's actually called is microelectromechanical systems (MEMS).

https://www.google.com/amp/s/www.forbes.com/sites/bernardmarr/2018/09/16/smart-dust-is-coming-are-you-ready/amp/

That articles from 2018.

Can smart dust be injected? By using ultrasound to communicate with the neural dust, the sensors can be made smaller and placed deeper inside the body, by needle injection or other non-surgical approaches.”Aug 3, 2016 That comes from DARPA. https://www.darpa.mil/news-events/2016-08-03 I can continue to to give you sources.