Pulipati , Sowjanya, A. Veenadevi, Surya Prabha Matangi, K. Preethi, and P. Srinivasa Babu. “Assessing the Relationship Between Vitamin D Supplementation and COVID-19 Risk: A Comprehensive Review”. Advanced Concepts in Pharmaceutical Research Vol. 3 (November 29, 2023): 104–121. Accessed June 4, 2026. https://stm.bookpi.org/ACPR-V3/article/view/12702.