The only thing that be called reasonable statistic is the number of deaths and that hasn't spiked - I hate to say - yet. It's possible hospitals are even missing those, it's a big country. And it's a dispersed country so things might not spread as quickly.
But other, what you say. Stopping large public events and doing mass testing seems crucial. South Korea seems to have gotten a handle on their infection process at the moment things are out-of-hand in Italy. South Korea has done mass testing for a while.
https://slate.com/news-and-politics/1997/01/the-bell-curve-f...
A few things to bear in mind, race is far more of a cultural construct than a genetic one. Compared to other species we don't show much genetic variation, and people of African descent are much more genetically diverse than the rest of humanity. Another is that IQs have been rising steadily around the world, proof that environmental factors such as nutrition and education have a a large effect.
"Coronavirus: British government makes contingency plan in case one fifth of UK workers 'off sick at same time' "