1. Public Health Emergency Center and
2. Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Guangdong Provincial Center for Disease Control and Prevention, Guangzhou,
4. Shandong Provincial Center for Disease Control and Prevention, Jinan,
5. Shanghai Municipal Center for Disease Control and Prevention, Shanghai,
6. Guangxi Provincial Center for Disease Control and Prevention, Nanning,
7. Institute for Viral Disease Control and Prevention,
8. China Office, US Centers for Disease Control and Prevention, Beijing,
9. Hunan Provincial Center for Disease Control and Prevention, Changsha City, and
10. Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China;
11. Chinese Center for Disease Control and Prevention, and