Experts Release Open Letter: Covid-19 Preys on Those with Vitamin D Deficiency

Quote from the letter:

> Vitamin D modulates thousands of genes and many aspects of immune function, both innate and adaptive. The scientific evidence shows that:

    > Higher vitamin D blood levels are associated with lower rates of SARS-CoV-2 infection.

    > Higher D levels are associated with lower risk of a severe case (hospitalization, ICU, or death).

    > Intervention studies (including RCTs) indicate that vitamin D can be a very effective treatment.

    > Many papers reveal several biological mechanisms by which vitamin D influences COVID-19.

    > Causal inference modelling, Hill’s criteria, the intervention studies & the biological mechanisms indicate that vitamin D’s influence on COVID-19 is very likely causal, not just correlation.