hbr.org/2020/03/lesson…
The most effective time to take strong action is extremely early, when the threat appears to be small — or even before there are any cases.
A second lesson that can be drawn from the Italian experience is the importance of systematic approaches and the perils of partial solutions.
Testing is effective when it’s combined with rigorously contact tracing, and tracing is effective as long as it is combined with an effective communication system that collects and disseminates information on the movements of potentially infected people, and so forth.
In our view, accelerating the diffusion of knowledge that is emerging from different policy choices (in Italy and elsewhere) should be considered a top priority at a time when “every country is reinventing the wheel,” as several scientists told us.
It is essential to adopt one that is systemic, prioritizes learning, and is able to quickly scale successful experiments and identify and shut down the ineffective ones. Yes, this a tall order. But given the stakes, it has to be done.