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https://2medical.news/2020/10/05/vitamin-d-sufficiency-a-serum-25-hydroxyvitamin-d-at-least-30-ng-ml-reduced-risk-for-adverse-clinical-outcomes-in-patients-with-covid-19-infection-2/
Vitamin #D sufficiency, a serum 25-hydroxyvitamin D at least 30 ng/mL reduced risk for adverse clinical outcomes in patients with #COVID-19 infection