Here is another interesting website about Herd Immunity
https://www.sciencedirect.com/topics/immunology-and-microbiology/herd-immunity
The significant take away is
“Herd immunity is an important element in the balance between the host population and the micro-organism, and represents the degree to which the community is susceptible or not to an infectious disease as a result of members of the population having acquired active immunity from either previous infection or prophylactic immunization (see p. 731).
From:
Medical Microbiology (Eighteenth Edition), 2012”
The key phrase here “having acquired active immunity from either PERVIOUS Infection or prophylactic immunization”.
Fact the Common Cold can be caused by a Coronavirus. Fact the body makes antibodies due to this infection. Fact the testing has been reported as to be rushed (number of proper protocol steps not done) and that the conversion fro RNA to DNA could be inaccurate and it is highly probable that the clusters of people found with antibodies from Coronavirus were not infected by Covid19. Our sources of information are the News Media that only reports sensational snippets of reality to scare the public.
Proper scientific investigation needs to be done by 3 or more non-biased scientists and physicians to establish the truth as to what is going on.
The scientific method is to constantly challenge the results to validate or update the theory. Einstein’s theory of relativity is tested and retested many times. Fact results that have been found to be true by some researchers have been found to be untrue by others because of contamination.
Right now the world is in fear mode that is being fanned by the Media. To overcome this one must do their own research and determine bias of the reporters and sift for the truth. If we are lemmings and blindly follow then it is full bio protection suits for all “the Sky is falling, the sky is falling”.