I made a chart using data up to May 16th from JHU for 11 countries, worldometer for Denmark and Portugal's DGS site for Portugal, using a Y-axis with logarithmic scale of 2, starting @ 40 infected cases. Here's how it turned out (click for full picture):
In this chart, the more horizontal the curve is, the better whatever measures have been taken are having their effects. Also, each horizontal line represents a doubling of the previous one so, for example, the roughly 4 horizontal lines separating Denmark from Germany indicate Denmark has roughly 1/16th the number of Germany's cases.
A few notes can be made:
- Denmark and South Korea have almost the same number of cases but South Korea's curve is better, though Denmark's is getting pretty close
- Sweden and Portugal had almost the same number of cases 2 days ago but Sweden has overtaken Portugal since then: as can be seen, it's curve is much worse than Portugal's
- Spain and France are virtually tied in their curves but Germany is better because of almost 3400 infected cases less
- Though Russia's number is worse, i'd argue Brazil's curve is the worse in this chart: Brazil, besides USA, has the highest number of daily new infections in the World but, while USA's daily numbers are trending down, Brazil's are trending up
- USA's curve is lowering it's angle but, and as the various states ease their restrictions, dunno if it will continue this way: USA has had the highest daily new cases in the world since @ least March 26th and, unless Brazil and Russia "catch up", that may not change any time soon