Where has a contact tracing app been successfully deployed at a large scale? Have those places seen any positive effect? Apple/Google's APIs were widely discussed a couple months ago, but (at least in the US) it seems to have fallen off everyone's radar.
I released a blog post (10min read) this past weekend breaking down digital contact tracing in the U.S. I also discussed why Google and Apple's solution isn't sufficient.
https://tolusnotes.com/state-of-digital-contact-tracing-in-t...