The effects of vitamin D on acute viral respiratory infections: A rapid review.

(2020) concluded serum status is likely to be a predictor of immune responses to vitamin D supplementation, and ARTI may be significant lower in vitamin D groups among elderly participants in long term care facilities, but concluded most trials demonstrated no overall differences in the incidence of upper respiratory tract infections between vitamin D and controls, likely due to participant and dosing heterogenicity [ 29 ].

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