A scientific review, published in 2006, concluded that the increase in seasonal flu virus's is due to the prevalence of vitamin D deficiency in the winter months. According to a Spanish study published online October 27, 2020, in The Journal of Clinical Endocrinology & Metabolism, 82.2% of COVID-19 patients tested were found to be deficient in vitamin D. … [Read more...] about We Need to Know the Truth About Vitamin D