Have not yet heard of any "escape communities/protective sequestration" here during the covid-19 crisis. Maybe China has stats on that?

This govt report addresses that issue.
http://chm.med.umich.edu/wp-content/...nza-Report.pdf

“These communities basically shut themselves down,” explains Howard Markel, an epidemiological historian at the University of Michigan who was one of the authors of the study. “No one came in and no one came out. Schools were closed and there were no public gatherings. We came up with the term ‘protective sequestration’, where a defined and healthy group of people are shielded from the risk of infection from outsiders.”
https://www.bbc.com/future/article/2...he-spanish-flu


In late 1918 the world’s greatest killer – Spanish flu – roared towards Gunnison, a mountain town in Colorado.

What happened next is instructive amid a new global health emergency a century later as the world struggles react to the emergence of a new coronavirus. Gunnison declared a “quarantine against all the world”. It erected barricades, sequestered visitors, arrested violators, closed schools and churches and banned parties and street gatherings, a de facto lockdown that lasted four months.

It worked. Gunnison emerged from the pandemic’s first two waves – by far the deadliest - without a single case. It was one of a handful of so-called “escape communities” that researchers have analysed for insights into containing the apparently uncontainable.

https://www.theguardian.com/world/20...h-flu-pandemic