Vitamin D3 oral rinsing reduces salivary SARS-CoV-2 antigen detectability: a clinical trial with public health implications - Sarah M. Nizar Feteih; Emily L. G. Heaphy; Amjad Aljagthmi; Abdullah Abumdaini; Daniyah Bayumi; Ghadeer Albishi; Ashraf Dada (Frontiers in Oral Health, 2026)