Vitamin D to prevent acute respiratory infections – The Lancet Diabetes & Endocrinology

Vitamin D to prevent acute respiratory infections – The Lancet Diabetes & Endocrinology
— Read on www.thelancet.com/journals/landia/article/PIIS2213-8587(21)00075-9/fulltext

Total body immersion (with care) in sunlight, as nudists/naturists do for example, would be another route to protection.