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.; Yusof, M. P. Descriptive Epidemiology of the First Wave of COVID-19 in Petaling District, Malaysia: Focus on Asymptomatic Transmission. Western Pac Surveill Response J 2021, 12, 7.