Acknowledgement
We thank Matt Moore (US CDC Hanoi) and Rogier van Doorn (Oxford
University Clinical Research Unit, Vietnam) for scientific review. We
recognized timely reagents supporting at beginning outbreak from WHO
Collaborating Center for Reference and Research on Tropical and Emerging
Infectious Diseases, Institute of Tropical Medicine, Nagasaki
University, Japan.
We gratefully acknowledge the contribution of health workers at Center
for Diseases Control and Prevention of cities and provinces in northern
Vietnam. We also thank health care practitioners of the clinics and
hospitals in Vietnam who supported the study.