Some of us are seeing effective contact tracing. The most effective step here, I believe, was requiring at-the-door call-backs to verify numbers given by people going clubbing.

(We're currently running 11/million new cases per day @ 3,2% unemployment. At one point our per capita case rate was much worse than that in the States.)

https://www.lemonde.fr/les-decodeurs/article/2020/03/27/coro...