[ajross]

This isn't really correct, and the proof is that most of east asia is relaxing restrictions right now without experiencing another exponential outbreak.

Testing, tracing and quarantine of infected people does work. It requires a bunch of infrastructure that we don't have yet (and in many places still aren't building, which is beyond frustrating). It also requires that the baseline level of the outbreak be small enough that you can catch most of the cases, which thus requires the continued lockdowns until we get back to that level. But it does work.