Krishna Supramanian, R., Sivaratnam, L., Rahim, A.A., Abidin, N.D.I.Z., Richai, O., Zakiman, Z., Md Taib, S., Soo, L., Jamalullai, S.H.S.I., Khirusalleh, M.N.A. and Yusof, M.P. 2021. Descriptive epidemiology of the first wave of COVID-19 in Petaling District, Malaysia: Focus on asymptomatic transmission. Western Pacific Surveillance and Response. 12, 2 (Apr. 2021), 7. DOI:https://doi.org/10.5365/wpsar.2020.11.4.001.