This work is supported by the National Key R&D Program of China(2020YFA0907100),the National Natural Science Foundation of China(NSFC)(82041048 and 81991494)and a grant from the Bill&Melinda Gates Foundation(INV-027420).L.D.is supported by the Excellent Young Scientist Program from NSFC(82122031)and the Chinese Academy of Sciences(YSBR-010).We thank Minrun Duan(Yunnan University),Tianyi Zheng(Zhejiang University),Sheng Liu(Southern University of Science and Technology)and Pei Du(Institute of Microbiology,CAS)for their assistance in the experiments and helpful suggestions.We thank Yuhai Bi,Ning Zhang,and all the staff of ABSL-3 at Institute of Microbiology,CAS for their assistance with the experiments performed in ABSL-3.We are grateful to Tong Zhao in Institute of Microbiology,CAS for her technical assistance with flow cytometry experiments.
Dear Editor,Since emerging in 2019,the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has caused an ongoing human pandemic of coronavirus disease 2019(COVID-19).^(1)Vaccines against COVID-19 were developed...