I see how you could do it.
If you had 33 different types of nano-particles and each type had a unique resonate frequency you could build a 33 bit binary string.
This would give you about 10 billion combinations.
When you make the batch, you either add or don't each frequency per each dose.
Every dose would be a unique 33 bit number.
You can make a simple passive resonator with an inductive connected bifilar coil.
https://en.wikipedia.org/wiki/Bifilar_coil
Then just nano size it.
This may require a feature on 5G.
I see how you could do it.
If you had 33 different types of nano-particles and each type had a unique resonate frequency you could build a 33 bit binary string.
This would give you about 10 billion combinations.
When you make the batch, you either add or don't each frequency per each dose.
Every dose would be a unique 33 bit number.
You can make a simple passive resonator with an inductive connected bifilar coil.