HOANG, Ngoc-Anh et al. Re-positive testing, clinical evolution and clearance of infection: results from COVID-19 cases in isolation in Viet Nam. Western Pacific Surveillance and Response, Manila, Philippines, v. 12, n. 4, 2021. DOI: 10.5365/wpsar.2021.12.4.857. Disponível em: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/857. Acesso em: 4 jun. 2026.