Ang ZY, Balqis-Ali NZ, Anis-Syakira J, Kong Y-L, Md Sharif S, Fun WH. COVID-19 clusters in Malaysia: characteristics, detection methods and modes of early transmission. Western Pac Surveill Response J [Internet]. 2023 Nov. 29 [cited 2024 May 9];14(4):11. Available from: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/1058