Wanted to pass on something from a few weeks ago. I had Covid back at the beginning of March. I only truly kicked it after (reading some preliminary reports on nutrition in people my age) I started adding vitamin D to my daily pill regimen. I started out at 2,000 units (2 pills), then after I got better I cut that back to 1 pill a day. Just for giggles, and because I know that vitamin D deficiency is one of those hidden health problems in America, I asked my doctor to do a vitamin D serum. Mind you, I am getting about 400 units per day in my multivitamin plus the 1,000 units in the pill. I got a call from the doctor's office today. Apparently my vitamin D levels were "just a little low"! So I'm back to taking 2,000 units per day. So if you're taking extra zinc and vitamin C to keep the flu at bay, look into increasing your vitamin D intake. Better yet, have your doctor check your vitamin D serum and see just how much extra you should be taking.