CHONG, Chee Fui et al. Impact of vaccination on COVID-19 severity during the second wave in Brunei Darussalam, 2021. Western Pacific Surveillance and Response, Manila, Philippines, v. 15, n. 1, 2024. DOI: 10.5365/wpsar.2024.15.1.992. Disponível em: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/992. Acesso em: 3 jun. 2026.