Sure, I've not seen any claims that vitD cures covid (although I can imagine they exist somewhere) - but the full body of science leans heavily towards it being

Sure, I've not seen any claims that vitD cures covid (although I can imagine they exist somewhere) - but the full body of science leans heavily towards it being a strong preventative measure against the worst clinical outcomes of a covid attack. I imagine your other points could be preventative as well and I would also highly recommend breathing clean air when possible and staying hydrated. I know that might sound silly to read, but simple measures to boost your own immune system really are far more powerful than society seems to give them credit for.