Srivastava, Deepak, Bhanu Singh, and Arvind Tiwari. “Herd Immunity-A Scientific Analysis”. Anusandhaan - Vigyaan Shodh Patrika 8, no. 1 (December 15, 2020): 186-190. Accessed March 24, 2026. https://anushandhan.in/index.php/ANSDHN/article/view/1699.