Folks should take multivitamins with chelated minerals (the most bioavailable form of mineral, like what's found in nature) if they want to stay healthy. I've been taking them for almost 30 years, and I can't recall the last time I've had flu symptoms... it's been years. Vitamins and minerals must both be present for the body to make the needed enzymes.
Did you know that Medicare pays a hospital $13,000 for every Covid-19 patient they admit? But if the hospital puts that patient in a coma and intubates them, the hospital gets $39,000. You can figure it out from there.