Cao, Rundong
Du, Yangguang
Tong, Jing
Xia, Dong
Song, Qinqin
Xia, Zhiqiang
Liu, Mi
Du, Haijun
Han, Jun
Gao, Chen
Article History
Received: 31 January 2023
Accepted: 12 April 2023
First Online: 13 July 2023
Declarations
:
: The study was approved by the meeting of ethics committee of national institute for viral disease control and prevention, China CDC, according to Chinese ethics laws and regulations(Ref. No.IVDC2019-105). Informed consent for the study was obtained from parents/guardians of child participants. All methods were performed by the relevant guidelines and regulations.
: Not applicable.
: The authors declare no competing interests.