You may want to read this article, I am sure there are other academic sources about what is transmitted. https://www.scss.tcd.ie/Doug.Leith/pubs/contact_tracin

You may want to read this article, I am sure there are other academic sources about what is transmitted. https://www.scss.tcd.ie/Doug.Leith/pubs/contact_tracing_app_traffic.pdf https://www.scss.tcd.ie/Doug.Leith/pubs/contact_tracing_app_...