https://www.dovepress.com/a-single-l...t-article-DDDT

Conclusion

Based on the antiviral and anticoagulant effects of Vit D, as well as its convenience and safety, we hypothesize that a single dose of 300,000 IU of Vit D can be helpful for the treatment or prevention of COVID-19 (Figure 1). It is very necessary to add Vit D to the ongoing treatment trials, especially in the case that no specific medications are available for the treatment of COVID-19.