Vitamin D is well known to be essential, but most people do not get enough. Evidence to date suggests the possibility that the COVID-19 pandemic sustains itself in large part through infection of those with low vitamin D, and that deaths are concentrated largely in those with deficiency.
COVID-19
SARS-CoV-2 illness
A comprehensive update of immunological mechanisms underlying positive effects of Vitamin D in reducing SARSCoV2 infection, and a thorough survey of recent epidemiological studies and clinical trials
