I think it Would be useful to also have "EU-big-4" (DE, IT, FR, ESP) selectable in the Sidebar, at the top of the List of Checkboxes.
Perhaps also a few more, generalized by region:
- nordic countries
- Mediterreaean
- EU, Northwest (UK, BEL, NL, DE, Ö) .
- Eastern Europe
I know that their authorities are counting cases differently.
But just for comparison of large economic regions (> 100-200 Million people each) it would be useful
Maybe I'll try this myself (and hopefully submit a PR)