Just over two years since the World Health Organization (WHO) declared the SARS‑CoV‑2 outbreak a pandemic, we find on PubMed a surprising number of publications (256,087 articles as of June 19, 2022). A smaller but still significant number of these – 1,189 – regard “COVID‑19 and vitamin D,” a figure which amounts to an average of … Leggi tutto Correlation between vitamin D deficiency and COVID-19: a critical review of the literature