Two months seems like the minimum. The really hard problem is that even if you reduce spread to near zero, it’s almost guaranteed that cases will continue to spread among the essential workers who are still active during the lockdown. As long as that’s the case, the end of the lockdown will result in the cycle starting over.<p>It seems to me that what we’re really doing with the lockdown is buying the time to “mobilize,” in the military sense, our healthcare system. If we had the testing capacity to test everyone and contain only the sick, this would be less serious. If we had 10x as many ventilators, and 100x as much protective equipment, this would be less dangerous. If we had an effective treatment (like a Tamiflu for Covid), then this would be less dangerous. Etc.<p>It seems to me unlikely that we will be locked down less than 2-3 months. But after that, I doubt the public will be willing to endure another global lockdown of this magnitude. Thus I think everything we’re doing now is really about delaying the inevitable long enough for us to get a coherent response in place.<p>To the extent that anyone is a “winner” in a pandemic, it certainly appears to be Taiwan and South Korea, who responded fast enough to the first wave to keep it from requiring an authoritarian response (or, at least thus far).