So lose weight and drink a lot of milk to help one's chances, huh? Maybe get in the sunlight a lot to boost the effects of the Vitamin D you take in. (not being facetious here). If you have any credible links about the Vitamin D, that would be helpful. I had not heard that yet. Thx.
My wife is on the front lines of this stuff and well read. Vitamin D is probably the most important and many adults don't get enough of it. Also helpful against Covid 19 are Zinc and Vitamin C. All 3 boost and support a healthy immune system.