1. College of Veterinary Medicine China Agricultural University Beijing China
2. CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Beijing China
3. Center of Influenza Research and Early‐Warning Chinese Academy of Sciences Beijing China
4. Research Network of Immunity and Health (RNIH) Beijing Institutes of Life Science Chinese Academy of Sciences Beijing China
5. Aviation General Hospital Beijing China
6. National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention (China CDC) Beijing China