The RFID chips here are based on Mifare tech and have a reach of ~10cm. I read a bit more and found that the transponders working at 433MHz can be identified of over a MILE away but you need strong antennas for that and they are really big so you can't get them into your body like the small ones.
But these are the same transponders that you're carkeys use! Really interesting stuff tbh.
Not gonna get it cause I hate getting shots
How exactly does getting an RFID chip into your hand mean giving up your freedom?