The most useful graph of coronavirus you need to understand

[Ole Waru]

Most countries have exactly the same growth trajectory measured from 100 cases. That's solid data about how this behaves.
Singapore and Hong Kong have been able to slow things down by strong measures, but it's still a straight line on a log graph, just with 1/3 of the growth rate. Italy is on the same line, just 8 days ahead of Europe and 13 days ahead of the US.
Only South Korea shows flattening so far.

 

[Ole masai]

Another useful perspective;

 

[Ramses]

Interpretation of the graphics......... how and why Korea is different from Italy