We have/had an in depth discussion going in another Covid thread regarding various treatments and supplements for Covid 19. Here's the thing. Most people just want a "silver bullet" for Covid 19. The reality is, there is no silver bullet. We don't even have a silver bullet for the common cold (which happens to be a Corona virus). The reality is, it takes a bunch of supplements and treatments working together to do a good job and +90% of the time they do. The other reality is, health professionals don't make money suggesting people take supplements. They make money when people are sick. While I believe most health professionals want to cure sick people, healthcare executives care more about money, success, wealth, and power.
The issue is, there is a consortium of politicians, pharmaceutical executives, Tech executives, health insurance executives, and healthcare provider executives colluding to prevent common, affordable treatment protocols along with immune building supplements from making it mainstream. Look no further than what medication treatments are covered under PREP immunity (meaning pharmaceutical companies can't be sued in the event of death, etc when prescribing off label, and look what isn't covered under PREP immunity. Its as simple as follow the money. Not necessarily at the healthcare provider level, but pharmacies, big pharma, politicians, health executives, etc. The whole system needs to be blown up and the deck re-shuffled.
As for immune strengthening, I go the route of daily: multi vitamins, 2000 mg Vitamin C, 200 mg Quercetin, 20 mg zinc, and Vitamin D. Exercise, eat right, and stay in shape.
One website to check out is
www.tessmed.com. This website founder and owner is a practicing licensed medical doctor (GP) and is focused on health supplements to boost immunity. The supplements are excellent.