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Article History

Received: 18 May 2021

Accepted: 11 January 2022

First Online: 19 January 2022

Declarations

:

: This study was approved by the Ethics Committee of Zhejiang Provincial Center for Disease Control and Prevention (CDC). The study protocol was performed in accordance with the relevant guidelines. The ethics committee approved the procedure for verbal consent because Zhejiang CDC has the authority of the Zhejiang provincial government to collect and utilize information on foodborne disease outbreaks, which is part of disease surveillance scope in Zhejiang CDC. All the participants were notified that they have the right to refuse or terminate the study at any point of the interview. Because we obtained verbal consent, documentation of consent was not required. However, the information provided by each participant was kept confidential in Zhejiang CDC. In addition, China’s National Center for Food Safety Risk Assessment (CFSA) is responsible for maintaining and managing the food-borne disease outbreak surveillance system, and our use of the data has been verbally approved by CFSA.

: Not applicable.

: The authors declare that they have no competing interests.