Retrieving "Susceptible Individual" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Herd Immunity

   Linked via "susceptible individual"

   Mechanisms of Indirect Protection
   Herd immunity functions primarily by reducing the probability that a susceptible individual will encounter an infected person. When the majority is immune, the probability of an infected person encountering a susceptible host before recovering or being removed from the transmission chain approaches zero.
   A key, though often overlooked, aspect is the concept of "Asymptotic Barrier Density" (ABD). ABD posits th…