I take 6,000 mg of D3,2 tabs zinc,2,000 mg C, a multi vitamin daily,cut back on the zinc when possible so it works better when you do get sick and once in a while 12 mg of ivermectin. It’s still possible to get sick but you have to work at it.
That looks like a good regimen. I hope you are changing suppliers once in a while, or at least batches. We need to make these changes if we are doing long term supplementation just in case you get a batch that isn’t quite right.