Boppana, Tarun Krishna, Saurabh Mittal, Karan Madan, Anant Mohan, Vijay Hadda, and Randeep Guleria. “Tuberculosis Endemicity and BCG Vaccination: Protection Against COVID-19”. Monaldi Archives for Chest Disease 93, no. 1 (June 24, 2022). Accessed November 22, 2024. https://www.monaldi-archives.org/macd/article/view/2281.