This map uses OpenLayers to display COVID-19 data* and Mapbox .mvt vector tiles generated from a world admin shapefile.
The vector tiles were generated using the ShpToMapboxVT utility.
ShpToMapboxVT can be found in the Example code and projects
*Data retrieved from: 'https://ourworldindata.org/coronavirus'.
Max Roser, Hannah Ritchie, Esteban Ortiz-Ospina and Joe Hasell (2020) - "Coronavirus Pandemic (COVID-19)". Published online at OurWorldInData.org.