"Effect of Calcifediol Treatment and best Available Therapy versus best Available Therapy on Intensive Care Unit Admission and Mortality Among Patients Hospitalized for COVID-19: A Pilot Randomized Clinical study"

 https://www.sciencedirect.com/science/article/pii/S0960076020302764

 Highlights

•The vitamin D endocrine system may have a variety of actions on cells and tissues involved in COVID-19 progression.

•Administration of calcifediol or 25-hydroxyvitamin D to hospitalized COVID-19 patients significantly reduced their need for Intensive Care United admission.

•Calcifediol seems to be able to reduce severity of the disease.