Hoang, N.-A., Pham, T.Q., Quach, H.-L., Nguyen, K.C., Colquhoun, S., Lambert, S., Duong, H.L., Tran, D.Q., Phung, C.D., Tran, N.D., Ngu, D.N., Tran, A.T., Nguyen, H.B.T., Dang, D.-A. and Vogt, F. 2021. Re-positive testing, clinical evolution and clearance of infection: results from COVID-19 cases in isolation in Viet Nam: Re-positive testing, clinical evolution and clearance of SARS-CoV-2 infection. Western Pacific Surveillance and Response. 12, 4 (Dec. 2021). DOI:https://doi.org/10.5365/wpsar.2021.12.4.857.