This right here. Been saying it all along. If one fifth of all common colds are coronaviruses, and if you have ever had a very similar strain, you may never get COVID-19, or only have very mild symptoms, because you already have the antibodies. This would be true of many people (one fifth of the population, so to speak). Since mostly older, vulnerable people are dying "with" (not from) CV, this would also prove that this entire clusterfuck has been much ado about nothing.
the herd immunity threshold (HIT) may be lower than previous estimates because many people may already be innately immune to COVID-19โwithout ever having caught the disease.