Funding for this research was provided by:
National Natural Science Foundation of China (82073613)
Program of Shanghai Academic Research Leader (18XD1400300)
National Science Fund for Distinguished Young Scholars (81525023)
National Science and Technology Major project of China (2018ZX10713001-007, 2017ZX10103009-005, 2018ZX10201001-010)
Received: 31 July 2020
Accepted: 2 November 2020
First Online: 2 December 2020
Ethics approval and consent to participate
: This study was approved by the Institutional review board from the School of Public Health, Fudan University (IRB#2019-08-0771). All data were collected from publicly available sources and did not contain any personal information.
: Not applicable.
: H.Y. has received research funding from Sanofi Pasteur, and Shanghai Roche Pharmaceutical Company; none of this research funding is related to avian influenza viruses. BJC has received honoraria from Roche and Sanofi Pasteur. X.C., W.W., Y.W., S.L., J.Y., B.J.C., P.W.H., and T.M.U. declare no competing interests.