Isn't there a statistic that the vast majority of people who get ill with COVID are deficient with Vitamin D?
Hard to work out whether its just a coincidence as I would imagine everyone in a nursing home would be deficient as they don't tend to get a lot of time outside. The majority of say 80+ year olds probably tend to spend more time in doors as well?
I seen a study and giving them vitamin D once they are ill doesn't seem to make a significant difference but who knows if it helps to fight it off in the first place?
I think it's safe to say the one rule of thumb is the healthier you are in general, then the less likely - of course you're not immune - you are to get really ill if you get this virus. There are of course exceptions and you can be a very healthy person who still has underlying conditions, while Lascelles and Allan Saint-Maximin at Newcastle are examples of athletes who have struggled with long-term after-effects.
But, generally, the healthier you are, the better your chances, so basically, exercise and get outside as much as possible/is safe to do so. Our bodies need it, they aren't made to be cooped up inside, and you can be outside and still not be endangering anybody. It's obviously harder in winter, but if you have time free in the weekdays, even just getting out on a brisk walk is definitely better for physical and mental well being than staying cooped inside, and is hardly risking yourself or just as importantly anyone else, if you keep your distance from others, which is entirely possible.