Acknowledgments
This study was funded by Beijing Wantai Biological Pharmacy Enterprise, and was also funded by the National Science and Technology Major Project (2020YFC0842600), the National Natural Science Foundation of China (82041038), the Fujian Provincial Science and Technology Plan Project (2020YZ014001 and 2022L3081), the Natural Science Foundation of Fujian Province (2020J06007 and 2021J02006), the Xiamen Science and Technology Plan Special Project (2022CXY0103 and 2022CXY0106), the Bill & Melinda Gates Foundation (INV-005834), intramural special grants for SARS-CoV-2 research from Ministry of Education and Xiamen University, and the Fieldwork Funds for graduate students of Xiamen University (2022FG020). We thank the participants who volunteered to be part of this study; the investigators at each site; and the members of the endpoint adjudication committee (Wenhong Zhang, Yuanlin Song, and Xiangyang Yao) and the independent data monitoring committee (Jielai Xia, Aiqiang Xu, and Jiming Zhang).