Investigation of three clusters of COVID-19 in Singapore: implications for surveillance and response measures
Rachael Pung, MSc *Calvin J Chiew, MPH *Barnaby E Young, MB BChir,Sarah Chin, MPH
Mark I-C Chen, PhD,Hannah E Clapham, PhD
Published:March 16, 2020DOI:https://doi.org/10.1016/S0140-6736(20)30528-6
Background
Three clusters of coronavirus disease 2019 (COVID-19) linked to a tour group from China, a company conference, and a church were identified in Singapore in February, 2020.
Methods
We gathered epidemiological and clinical data from individuals with confirmed COVID-19, via interviews and inpatient medical records, and we did field investigations to assess interactions and possible modes of transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Open source reports were obtained for overseas cases. We reported the median (IQR) incubation period of SARS-CoV-2.