https://amgreatness.com/2020/04/12/herd-immunity-vs-herd-mentality/
Although we do not yet know every detail of the end of our infatuation with the coronavirus, it’s clear that the historian of this episode will include a chapter called “Mistakes Were Made.”
If I might adapt Keats, “much have I travell’d in the realms online, / And many goofy states and kingdoms seen.” And if my experience wasn’t quite like that of the “watcher of the skies / When a new planet swims into his ken” (or even “like stout Cortez when with eagle eyes / He star’d at the Pacific”), still there have been discoveries that produce a little frisson of recognition.
The most recent was the distinction I saw somewhere between herd immunity, on the one hand, and herd mentality, on the other.
We’ve been hearing a lot about “herd immunity” lately. Along with the phrases “social distancing,” “flattening the curve,” and “sheltering in place,” “herd immunity” is one of the chief flecks of jargon adopted by newly minted amateur epidemiologists in this age of (new master word) coronavirus. (And it seems we’re all epidemiologists now, in more or less the same sense that the future King Edward VII was correct when he observed, in 1895, that “we’re all socialists now.”)
“Herd immunity” is a settled concept in epidemiology. It occurs when “a large percentage of a population has become immune to an infection, whether through previous infections or vaccination, thereby providing a measure of protection for individuals who are not immune.”
“Herd mentality,” on the contrary, provides immunity from independent thought. It protects a population from thinking clearly by spreading a spirit of conformity. It increases a people’s docility, thus rendering them more susceptible to the blandishments of usurping authority.