“My problem with contact tracing apps is that they have absolutely no value…I’m not even talking about the privacy concerns, I mean the efficacy. Does anybody think this will do something useful? … This is just something governments want to do for the hell of it. To me, it’s just techies doing techie things because they don’t know what else to do.”
https://www.schneier.com/blog/archives/2020/05/me_on_covad-19_.html