Hoang N-A, Pham TQ, Quach H-L, Nguyen KC, Colquhoun S, Lambert S, et al. Re-positive testing, clinical evolution and clearance of infection: results from COVID-19 cases in isolation in Viet Nam. Western Pac Surveill Response J [Internet]. 2021 Dec. 13 [cited 2026 May 30];12(4). Available from: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/857