Of course, that relies on people voluntarily checking in, scanning QR code, and making sure that the telecom that they trust store the 28-days history of their whereabouts when checking in all the venues and public transportation.
Of course, that relies on people voluntarily checking in, scanning QR code, and making sure that the telecom that they trust store the 28-days history of their whereabouts when checking in all the venues and public transportation.