"Patients with vitamin D deficiency (<20 ng/mL) were 14 times more likely to have severe or critical [Covid] disease than patients with 25(OH)D ≥40 ng/mL."
Peer-reviewed study: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0263069
I have Covid right now, been sick for 2 days, took Zinc + Vitamin D + Vitamin C this morning and now I feel extremely great hahaha you can't make this shit up seriously