The "herd immunity" neologism (read: socially acceptable endemic disease) has never made an sense to me. Narrative and computational biology versions of that "theory" have cropped up from time to time in MSM as if such as public health policy were tried and true, "experienced based," according to modern coin with/without hand-held DATA VISUALIZATION tech. m'k. Sure. Until one gives a moment to historical account or attempts a count of eradicated virus. All I've got is small pox, and that washed out over n generations of ahh seminal innoculation regimes. Raise your finger if you have a scar. Or your gov DoD preserve samples.

Truth is, people simply are not, may never be, sufficiently organized to test theory definitively. Free-range, liberal, etc. As important, European intellectual history abhors AUTHORITARIAN CIVIL indoctrination except religious instruction. So. Medieval medicine. Roll eyes.