Wouldn't this make 'now' a good time to do a study on Vitamin D? Basically, give a grup vitamin D supplements, and compare to placebo group? Because curing all

Wouldn't this make 'now' a good time to do a study on Vitamin D? Basically, give a grup vitamin D supplements, and compare to placebo group? Because curing all the coronavirus histeria, i know people who've gone sunbathing for too long in relatively cold weather, because some study somwhere found out that a bunch of people who died from covid had very low vitamin D, and by correlation=causation logic, they though they needed more (but ignore the fact that most dead here were eldery in retirement homes, bedbound and pretty much never in the sun at all).