DNA website
See the gh-pages for the website, which is published here: https://dna-en.github.io/website/
Useful documents
See the "Exposure notification metrics, data sources, and definitions" document at https://docs.google.com/document/d/1s_ssTiYYxXShGND7VygbLskKlMpTBA6Df49sFwr2Agg/edit#