I have yet to hear of anybody with decent levels of Vitamin D succumbing to COVID.
Get outside and get some fresh air each day (without a mask) and get some sun (without sunscreen) and take at least 2,000 IU of Vitamin D (4,000 IU is better) and you will almost never get sick.
Vit D tends to crater at old age. Skin loses its ability to create it from sunshine, and US latitudes make it worse.
And it’s not a typical blood test.
Not surprising we don’t hear about it.
Just another reason why the old get scythed by the virus and the young do not.
My doctor put me on 2000 vitamin D, and I get plenty of sun. Couldn’t tell you when I was last sick—with anything!