On 2021-02-21 at 10:32:59 MST, "Muggles" wrote:

Herd immunity happens in an open environment where NOT all people
actually get infected.

Herd immunity happens in ANY environment €” eventually. The question is how
many members of a herd must get infected (or vaccinated) before their immunity
serves to protect the remaining members of the herd from infection. By
reducing the other variables such as distancing, the prison "experiment" shows
that the number for SARS-CoV-2 is MUCH higher than Makary's 55%.