Researchers from the Department of Medicine and Center for Health and the Social Sciences, University of Chicago, reported in the September 3rd. 2020 online edition of JAMA (Journal of the American Medical Association) Network Open that, “in this single-center, retrospective, cohort study, likely deficient vitamin D status was associated with increased COVID-19 risk, a finding that suggests that randomized trials may be needed to determine whether vitamin D affects COVID-19 risk.”Vitamin D de...