I would note: South Korea and Italy had equivalent infection figures today. South Korea's mortality rate has held steady at .6% while Italy's has been around 4% - quite a bit more death. Basically, strong evidence South Korea is good model for controlling Covid. [1]
Korea has had a policy of aggressive testing, aggressive tracking infections and publishing infectees previous locations online (but not names).
There's literally drive-through testing. Anyone who wants to get tested can be tested. [2]
[2] https://www.cbsnews.com/news/coronavirus-south-korea-drive-t...
Edit: Article from the Atlantic: "Exclusive: The Strongest Evidence Yet That America Is Botching Coronavirus Testing" [3]
[3] https://www.theatlantic.com/health/archive/2020/03/how-many-...