Digital contact tracing was a failure in practically every country, and there is a techincal problem: all these apps uses Bluetooth to measure the distance, sin

Digital contact tracing was a failure in practically every country, and there is a techincal problem: all these apps uses Bluetooth to measure the distance, since GPS impacts privacy too much, and also battery life on the device, and doesn't work well in closed spaces. But you cannot have enought resolution with bluetooth to distinguish between 1 meter and 2 meters (the distance that is considered safe), you can have precision in tens of meters. Also you get a ton of false positives, for example caused by people that passes nearby buy you don't came in contact with (e.g. people in the car near you when you are stopped in the traffic). Finally the idea that people wants to collaborate is pure utopia, yes there are people that wants, but the majority of people don't want to install an app that if they possibly came in contact with one people that have the virus (something that if we all install the app was certain, at least in the last winter) will force you to isolate for 14 days, that includes not going to work without getting money for sickness since you are techincailly not ill. Basically it's a failure the whole concept of digital contact tracing, not the implementations.