Temporal Association of Reduced Serum Vitamin D with COVID-19 Infection: Two Single-Institution Case–Control Studies
Round 1
Reviewer 1 Report
The article is very well written and I have no comments.
I suggest it be published
Reviewer 2 Report
Work well prepared. It accurately indicates the critical points and sources of discrepancies in the research conducted so far on the direct role of vitamin D supplementation in COVID-19 infections. The analysis carried out takes into account a wide range of strengths and weaknesses of the study. The results are not spectacular, but statistically significant. Regardless of expectations, the work is yet another one that confirms the relationship of vitamin D to COVID-19 infections.