> Hence I've been avoiding adding Vitamin D
Do you have active symptoms?
The concern is about a studied connection between Vitamin D supplementation and an increase in concentration of the IL-1b inflammation marker (see, e.g., [1]), which has been implicated in cytokine storms. The other supplements mentioned have similar effects.
This correlation suggests that you might not want to be taking Vitamin D if you're as risk of a cytokine storm hurting you.
That said, however, vitamin D is also associated with strong anti-inflammatory properties of other markers, so really -- it's super hard to predict what will happen. As far as I know, no one has observed a connection between Vitamin D and cytokine storms directly, so the whole thing is kind of hypothetical.