"Caution: Preprints are preliminary reports of work that have not been certified by peer review. They should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information."
‘Suppressing’ might be a loaded term, as is implies cytokine storms are not simply a complication of an unregulated immune system (Vitamin D deficit) to begin with. Cause and effect need to be worded with baseline scenarios.