Ang, Z. Y.; Balqis-Ali, N. Z.; Anis-Syakira, J.; Kong, Y.-L.; Md Sharif, S.; Fun, W. H. COVID-19 Clusters in Malaysia: Characteristics, Detection Methods and Modes of Early Transmission. Western Pac Surveill Response J 2023, 14 (4). https://doi.org/10.5365/wpsar.2023.14.4.1058.