Schneier is correct in that the proposed method is almost worthless for effective contact tracing. However, he does not offer a viable alternative. There have

Schneier is correct in that the proposed method is almost worthless for effective contact tracing. However, he does not offer a viable alternative. There have been large-scale ground-truthing experiments run in cities like Manhattan for similar types of data models where population coverage was similar to the most optimistic projections for the proposed contact tracing method. We have a lot more data on the effectiveness of this type of tracing than most proponents and bystanders know, and it provides plenty of reason to believe the bluetooth proposal is an exercise in futility. Methods that would likely produce an effective data model exist but they are much more difficult to navigate as there is no legal framework for it, though technically possible. Discussion of contact tracing has been taken over by armchair experts who have a naive understanding of the complexities of the problem, particularly when a disease is already endemic. Technical implementations that would have broad efficacy in a country like the US are at least a year away, and several governments are aware of this. Some governments are rolling out contact tracing programs they know have low efficacy for the sake of appearances.