It is indeed working. And we knew it would work. Now here's the challenge. As the curves approach the static R=1 line, the speed of approach tends to decrease.
https://twitter.com/DFisman/status/1249101551945125892?s=19

Everyone makes the same mistake. (1) They start backing off. (2) They forget about the spatial lag, as the wave moves out of urban centers and into regional satellite populations. https://twitter.com/barryjcooke1/status/1249123995078799362?s=19

Many in your timeline are suggesting we go back to work soon. The results of this are heartbreaking, like what's happening in Sweden. They were better than Denmark & they went back to school & back to work too soon. They regret it.

You cannot go back to work until you have a large-scale test and trace surveillance program. The result of premature re-opening is a heart-breaking rapid loss of all you worked to gain.