Well choose your sources carefully. For example, you could look at the overview of vitamin D in relation to Coronavirus in the highly-respected BMJ (British Medical Journal). In sum, it says that evidence for vitamin D efficacy is sparse, inconsistent, weak and often in disregard of confounding factors. Additionally, you are bigging up out of all proportion the risks of vaccines and you are defending refusers. Demurring at the only thing that will get us out of this whilst promoting ineffective measures is the recipe for prolonging this pandemic.