What is herd immunity?
August 13, 2020
Herd immunity sometimes referred to as HIT for Herd Immunity Threshold, is the point at which a virus has more difficulty spreading because a significant amount of people have become immune. It is essential to know that once herd immunity is achieved, it does not mean a virus is gone, or everyone is immune at that point.
A simple way to think of it may be to think of a wildfire. When firefighters have stopped the fire from spreading, it is similar to having reached herd immunity in a pandemic. The fire is not out yet, and a danger of reignition exists until it is entirely extinguished. A ch...