CovidCards use Bluetooth radio signals to measure how close people come to one another and how long for. Contact tracing within families and non-public facing workplaces isn’t really the problem. We would be better able to use smartphones as Bluetooth tracing devices if we wore them as lanyards or duct-taped them to our chest, but that’s not realistic. Even if 70 per cent of people used a Bluetooth contact tracing app on their smartphone religiously, that would translate into just under half of contacts (49 per cent) being traceable. But I do feel CovidCards would give us chance of doing more than just “delaying the inevitable” and, yes, I’d wear the damned lanyard.

Source: Stuff August 28, 2020 17:02 UTC