Received: 27 February 2018
Accepted: 24 September 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The study was fully reviewed and approved by the Ethics Committee of the Guangzhou Center for Disease Control and Prevention. Informed consent in written format to participate have been obtained from all the dengue cases before a face-to-face case investigation was started. All of the case data in the study were anonymized and the identity of any individual cannot be uncovered.
: Not applicable
: The authors have declared that no competing interests exist.