Until there is a readily reliable test to evaluate for T cell immunity, then there is no definitive way to determine an individual’s immunity. Also not until the susceptible genotype of people who become infected, become ill or die from this virus is defined and understood, it will be a crap shoot for anyone initially exposed.
What is ignored is that while CV-19 is real and more virulent and dangerous than the typical flu, virtually no one in good, non-overweight, active-outdoor exercise health should or does need hospital care for it or dies from it. Unlike the Asian flu of 57-58 that saw the equivalent of approx. 200,000 Americans die as a result, today 42% of the pop is obese, more suffer from hypertension, and overall the nation is in worse health. But instead of blaming this, people look to the government as if it were God, and protest due to conditions that are really mostly due to their fault.