I saw a study that was conducted several years ago at a prison in Texas. They gave half the population regular doses of vitamin D (can’t remember the amount) and the other half a placebo. During the corresponding flu season not a single person in the treated group acquired the flu while the placebo group had what was considered to be a normal rate of infection. I recalled reading that study when the Fauci Flu hit back in March, 2020. Began dosing with 4,000 units daily plus C. Got the coof this past August. Felt crappy for a few days then like sht for a coupla days then back to normal in another week. I do believe the D made a difference.
Another good call, but you CAN go too high.
Pretty hard to do. I think 60,000 IU daily for several months will go toxic.