Shah, Jay, Priscilla Samson, Nabees MS Pradhan, Ashis Shrestha, Shreekrishna Maharjan, Shanta Dangol Shrestha, and Sarala KC. “Breakthrough Infection After Covishield COVID-19 Vaccine Among Health Care Workers at Patan Academy of Health Sciences, Nepal”. Journal of Patan Academy of Health Sciences 8, no. 2 (August 31, 2021): 10–17. Accessed January 22, 2022. https://www.nepjol.info/index.php/JPAHS/article/view/28833.