On March 13, 2020, this report was posted online as an MMWR Early Release.Yixiang Ng, MSc1*; Zongbin Li, MBBS1*; Yi Xian Chua, MSc1; Wei Liang Chaw, MSc1; Zheng Zhao, MSc1; Benjamin Er, MSc1; Rachael Pung, MSc1; Calvin J.
Chiew, MPH1; David C. Lye, MBBS2,3,4,5; Derrick Heng, MPH1; Vernon J. Lee, PhD1,6* (View author affiliations)First detected in China in late 2019, coronavirus disease 2019 (COVID-19) transmission has spread globally.Singapore implemented a multipronged surveillance and containment strategy that contributed to enhanced case ascertainment and slowing of the outbreak.