Google and Apple are now doing a version of this: https://techcrunch.com/2020/04/10/apple-and-google-are-launching-a-joint-covid-19-tracing-tool/ https://techcr

Google and Apple are now doing a version of this: https://techcrunch.com/2020/04/10/apple-and-google-are-launching-a-joint-covid-19-tracing-tool/ https://techcrunch.com/2020/04/10/apple-and-google-are-launc...