On a Recent Meta-Analysis Suggesting that COVID-19 Mortality Risk Correlates Inversely with a Person's Vitamin D3 Status and that a Mortality Rate Close to Zero Could Theoretically Be Achieved at 50 ng/mL 25(OH)D3 - https://pubmed.ncbi.nlm.nih.gov/34684596/

Holy moley, so for three to ten cents a day (depending on dosage and brand) you can potentially bullet-proof yourself not just from COVID but from other respiratory illnesses AND you can achieve this without having to consume an experimental biological agent. Wow, now that is great news. Only wish that I didn't have to, you know, DIG FOR IT!!