“Herd Immunity” used to be a technical term rarely used beyond the disciplines of epidemiology or vaccine science.
But now it’s one of the most controversial concepts of the coronavirus pandemic.
It’s a simple concept: as a population is being exposed to a virus, people become immune and can no longer spread the bug to others.
Once a certain threshold is reached, there simply won’t be enough susceptible people left for the virus to infect and that’s herd immunity.
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