Tan, Shi Ying, Shyh Poh Teo, Muhd Syafiq Abdullah, Pui Lin Chong, Rosmonaliza Asli, Babu Ivan Mani, Natalie Riamiza Momin, Adrian Chin Ann Lim, Noor Affizan Rahman, Chee Fui Chong, and Vui Heng Chong. “COVID-19 Symptom Duration: Associations With Age, Severity and Vaccination Status in Brunei Darussalam, 2021”. Western Pacific Surveillance and Response 13, no. 4 (November 7, 2022): 9. Accessed April 29, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/941.