Ung, Trang thi Hong, National Influenza Center, National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam, Viet Nam

• Western Pacific Surveillance and Response Vol. 13 No. 3 (2022): July ‒ September - COVID-19: Field Investigation Report
  Occurrence of the Omicron variant of SARS-CoV-2 in northern Viet Nam in early 2022
  Abstract  English PDF