Funding for this research was provided by:
scientific research projects of the General Administration of Customs, China (2021HK133)
Received: 29 July 2022
Accepted: 24 February 2023
First Online: 5 March 2023
: No specific permits were required for this study. (1) All experiments were conducted within state-owned land in China. (2) The samples used in the study are virus samples and do not involve human subjects research. (3) All samples were intercepted by the entry health quarantine of Hangzhou Customs District P. R. China. All procedures comply with relevant customs policies, including confidentiality of personal information. Other informed consent statements are not required. Therefore, the local ethics committee deemed that approval was unnecessary.
: Not applicable.
: The authors declare that they have no competing interests.