Govindapala, Dumitha, Dhanuka Dhanaratna, Uththara Senarath, Dilusha Lamabadusuriya, Thamarasi Senaratne, Wasantha Wijenayake, Dasun Wijewardena, Dilini Nakkawita, Pawanie Kawyangana, Upeksha Kulasekara, Aruna Darshan De Silva, and Nayana Fernando. 2022. “Reactogenicity and Persistence of IgG Antibodies Against SARS-CoV-2 Among Recipients of ChAdOx1 NCoV-19 Vaccine: A Single Center Experience from Sri Lanka”. International Journal of Health Sciences 17 (1):36-43. https://pub.qu.edu.sa/index.php/journal/article/view/7176.