Besides other supplements and vitamins, I take Vit. D (5000iu), Zinc, Vitamin C, and Quercetin daily to help ward off Covid. I also take Turkey Tail - it’s excellent for the immune system.
Never heard of Turkey Tail.
I take 5000 D3, quercertin, 50 mg zinc, 2000 C, NAC and a couple others...still I got COVID but I think it’s the omicron. Dr wouldn’t give me anything - so I added horse paste until my ivermectin arrives from India. The horse paste seemed to really help - now I’m down to a dry cough.