Very nicely presented. All data sources are legitimate.

Makes me want to return to my open-office layout at work a lot less.

Using Bluetooth is very smart, and it means that it can be done in a way that preserves privacy unlike following people around through their cell connections. It should also be more precise.

Article explaining how it works

Technical papers

Same data as the John Hopkins website but with better visualization.

Crowdsourced Covid-19 tracking.

As usual, clear scientific writing from Ars Technica.

GitHub repository with all code and data used by the The COVID-19 dashboard I linked to a few days ago.

Statistics and graphs about the COVID-19 Coronavirus epidemic.