I wonder, when I see stories about studies about treating patients with basic nutrients and vitamins, if a root-cause to consider is that our standard diets are so deprived of essential vitamins and minerals that "treating" someone with what they have been missing causes the body to simply function the way it's supposed to. I haven't read the full study but if it takes into account what someone's diet was prior to th…
FWIW older people are usually more often indoors and have both higher likelihoods of becoming hospitalized because of Covid and are more often indoors, thus prone to Vitamin D insufficiency.