Low 25 D- a marker for illness, NOT the cause.
Low Serum Levels of 25-Hydroxyvitamin D Accompany Severe COVID-19 Because it is a Negative Acute Phase Reactant
Following the onset of the COVID-19 pandemic, there has been considerable interest in the possibility that low vitamin D levels are associated with severe illness and mortality in this disease.
As of today (April 27, 2021) a PubMed search for CO…