Sarkar A, Roy KK, Zangmo R, Jayraj AK, Kaushik D, Rai R. Reaching the one billion mark: accomplishing the success story of COVID vaccination through public interrogation. Int J Reprod Contracept Obstet Gynecol [Internet]. 2022 Apr. 27 [cited 2025 Oct. 13];11(5):1521-4. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/11572