Herd immunity is just another name for natural immunity - and natural immunity is just a term for any immunity that is stimulated by natural exposure the population, rather than by artificial exposure in a lab (vaccine).
The important thing to remember is that natural immunity is the only kind of immunity we have. There is no man-made alternative to the human bodys ability to develop antibodies.
Man-made vaccines developed in the lab still rely on the same principle of stimulating the human bodys natural immunity through exposure - the difference is that the exposure process takes place in a lab with test subjects rather than naturally through the herd.
Each of us is a complex walking laboratory, perfected over ten million years of evolution (natural selection).
So, before we discount natural herd immunity as some crackpot anti-science alternative medicine idea, we should remember that man-made vaccine technology relies 100% on the bodys immunity system to work. 100%!
Let that sink in: It is our bodies that ultimately save us, even with a vaccine. In fact, a vaccines effectiveness is measured by how it compares to natural immunity.
To be fair, there are certain advantages to man being able to control the process of exposure via vaccine technology. It allows for monitoring progress under controlled conditions. It allows us to track who is immunized and who is not.
For liberty-loving Americans there are some disturbing aspects of vaccine vs. natural (herd) approach to immunity as well. Obviously, vaccine technology is far more conducive to central planning and socialist agendas than is natural immunity. You cant control people even letting them do whatever they want. Already, leftists are talking about requiring under-the-skin chips to track who has been immunized. Seriously?
And lets not forget the profit motive. Big Pharma owns much of the DC bureaucracy and Ivy League academia - they can patent vaccines but they cant make a dime on herd immunity.
As we decide which scientists to listen to, we should always follow the money.
Herd immunity is the immunity a population has that has either innate or acquired immunity. Acquired immunity comes from antibodies, which could be from vaccines or having had the illness already.