TAN, Shi Ying et al. COVID-19 symptom duration: associations with age, severity and vaccination status in Brunei Darussalam, 2021. Western Pacific Surveillance and Response, Manila, Philippines, v. 13, n. 4, 2022. DOI: 10.5365/wpsar.2022.13.4.941. Disponível em: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/941. Acesso em: 3 jun. 2026.