Tan, S. Y., Teo, S. P., Abdullah, M. S., Chong, P. L., Asli, R., Mani, B. I., Momin, N. R., Lim, A. C. A., Rahman, N. A., Chong, C. F. and Chong, V. H. (2022) “COVID-19 symptom duration: associations with age, severity and vaccination status in Brunei Darussalam, 2021”, Western Pacific Surveillance and Response, 13(4), p. 9. doi: 10.5365/wpsar.2022.13.4.941.