It is time for a reminder that the optimal herd immunity strategy requires a hard lockdown. This paper by @LukaszRachel demonstrates the idea. https://drive.google.com/file/d/1tVTfyEeD0xTIcZVlvCZvDN95CZ6uVdmU/view [1/3]

If the HI threshold is 2/3's there will be 87% infected if left to itself. Instead, to get there quickly and economically what you want to do is let the virus run initially and then switch to a hard lockdown to 'land' the economy at exactly HI and zero infections. [2/3]

In other words, there is a herd immunity strategy (based on inaction) and a herd immunity strategy that gets you higher economic activity and lower deaths. The latter requires a hard lockdown at the end with some precision timing. So much for libertarianism. [3/3]