We have already doing this QR CODE, restaurants and pubs and even talks away. Supermarkets, once you are at the door of any restaurant, shop etc etc, you needs to take your smart phone to scan, my is iphone 10 so I can download from Apple store. It’s been on since last two months, the QR CODE is like a scan code like buying groceries and scan for payout. Ok here u scan in and then scan out, not too much trouble and each places has a different QR CODE; our government will know which restaurants or pubs ect that you have been in case some one get the virus or have the symptoms for they to find the source , then checking lists to contact you , it’s not too bad and if I lucky you were in one of those places, they just call and ask you to go test. Don’t worry too much, the inly I would worry is to take the bloody injection but 😩 lucky we elder will not be the first testers