Fauci takes 6000 IUs a day. 5000 may not be enough. It depends on the individual. I was taking 10000 IUs and my vitamin D level went to 100, so now I have backed off to 6000 like the evil Dr Fauci.
All those moments at the podium, and Dr. Fauci doesn’t recommend that the rest of us take Vitamin D like he does. Nor is it permissible treatment protocol.