A "vaccine" applies selective pressure to the pathogen to evolve a resistant variant to the vaccine. In a pandemic, you have an enormous population that will be evolving resistant variants in parallel. The result is a broad range of resistant variants circulating...many of which are more communicable and lethal than the original. That is precisely what is occurring with SARS-CoV-2. It is a lesson we failed to learn from chickens and Marek's disease. It's already too late to undue the damage.
Observe the "bushing out" of the variants that followed introduction of vaccines on this web page.
Had we simply treated with HCQ/zinc/azithromyic and/or ivermectin and reduced inflammation in lung tissue with budenoside type steroids, the selective pressure would not have been introduced into the population. Broad, natural immunity to the whole virus would have been generated instead of narrow antibodies to a very early version of the spike protein.