I've read where some humans have already been implanted with microchips in their hands. As you may know, microchips are little devices that can be implanted in animals as well as humans for identification and tracking purposes. They are mostly implanted in animals just in case someone's pet gets lost and they need help in tracking their whereabouts.
But a lot of people have an aversion to having this device put under their skin, because they feel that it would be an invasion of privacy, and that it would feel too un-human. I saw a video of the chip being placed in a man's hand between his thumb and index finger. It only took a few minutes for him to get implanted, but most people I've talked to about this procedure said that they would never get it done. Neither would I.
I just hope that the government doesn't decide to make getting the microchip mandatory one day, as I've heard could be a possibility.