Among those without deficiency who are hospitalized, only 3% die; patients with insufficient D are also 14 times likelier to end up in severe or critical condition, research shows.

“Hospitalized COVID-19 patients are far more likely to die or to end up in severe or critical condition if they are vitamin D-deficient, Israeli researchers have found.

In a study conducted in a Galilee hospital, 26 percent of vitamin D-deficient coronavirus patients died, while among other patients the figure was at 3%.

“This is a very, very significant discrepancy, which represents a big clue that starting the disease with very low vitamin D leads to increased mortality and more severity,” Dr. Amir Bashkin, endocrinologist and part of the research team, told The Times of Israel.”

https://www.timesofisrael.com/1-in-4-hospitalized-covid-patients-who-lack-vitamin-d-die-israeli-study/