Roger Seheult MD Discusses the role of vitamin-D in helping the body fight the effects of SARS-CoV-2 virus, with special focus on the arterial lining, the endothelium, where the battle for life is fought. Recent paper has more vitamin-D data, and it's all the same, just more. Take 5000 units per day, or whatever it takes to get your level above 60. He recommends 50,000U initial dose for all hospitalized patients.
Look at 11:30 to 13:30 (the last 2 minutes) for specifics on vitamin-D in hospital by this critical care pulmonologist. This COVID-19 update series is excellent!
JCEM paper cited in lecture: https://academic.oup.com/jcem/
Charoenngam/Holick paper cited in lecture: https://www.researchgate.net/
This is a comprehensive aggregation of papers relating directly to Vitamin-D levels and supplementation in COVID-19 https://www.ncbi.nlm.nih.gov/
This much cited Indonesian study , reported in June, is included in the above analysis, and is worth its own link: https://emerginnova.com/
My general advice for people over 100# is to take 5000 units of vitamin-D daily, long term, unless you have not been taking it, in which case, take 10,000 units vitamin D3 daily until Thanksgiving or Christmas or New Years Day or something. If you weigh 80# take 4000 units per day, 60# gets 3000 units, etc.
A Case Series of 100 COVID-19 Positive Patients Treated with Combination of Ivermectin and Doxycycline