Anyything that makes your immune system work properly will help, the reason Covid is even a subject is that there is a silent epidemic of immunocompromised peop

Anyything that makes your immune system work properly will help, the reason Covid is even a subject is that there is a silent epidemic of immunocompromised people, a large number of which are unaware that they are - the kind of people who routinely get sick in the winter, for instance. It's very strange that we are pretending that healthiness doesn't exist or can't be improved. It can, and rather easily and cheaply (yes, Vitamin D is one, but also, especially for Covid, anything that improves vascular function, as the etiology of Covid is closely linked to vascular health... which is where Niacin (vitamin B3), vitamin C, and reducing /eliminating sugar come in).