re: Not Enough Research of the Protection Levels of Natural Immunity of Infection

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Frankly, for this sort of virus, robust and long standing resistance for future infections is sort of presumed until data suggests otherwise.

I want to say that's the harmless answer as to why no research, but the realist in me knows it is because there is literally no money in such research.

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Whether or not there is an incentive to study the effectiveness of the immunity granted by actually having the virus, there is a bigger problem on how exactly that would be studied. With the vaccine, the exact dose is known and its efficacy can be determined based upon whether those who receive it test positive and then the viral load can be determined. The control group and test groups are well known including all of the numbers, ages, health status and other demographic data.

With the virus being out in the wild and only having a positive or negative test result that may or may not show current or earlier exposure, dose, or even whether the person testing positive has already been exposed and to which variant etc., not to mention the lack of any control group, trying to figure out how effective natural immunity is just isn't the same animal as studying a vaccine.