[Poster Session 2] Viral Infections

[P-022] Pre-existing neutralizing activity to SARS-CoV-2 in Vietnam prior to COVID-19 pandemic, 2014-2019.

^○Thi Thanh Ngan Nguyen^1,2,3,4, Ee Mei Choo^1,2, Mizuki Fukuta^1,2,3, Co Thach Nguyen⁴, Thi Thu Thuy Nguyen⁴, Le Khanh Hang Nguyen⁴, Thi Thanh Le⁴, Vu Mai Phuong Hoang⁴, Morita Kouichi^1,2,3, Duc Anh Dang⁴, Hasebe Futoshi^1,5, Thi Quynh Mai Le⁴, Ling Moi Meng^1,2,3 (1.Graduate School of Biomedical Scienes, Nagasaki University, Sakamoto 1-12-4 Nagasaki 852-8523, Japan, 2.Department of Virology, Institute of Tropical Medicine, Nagasaki University, Sakamoto 1-12-4, Nagasaki 852-8523, Japan, 3.Program for Nurturing Global Leaders in Tropical and Emerging Communicable Disease, Nagasaki University, Sakamoto 1-12-4, Nagasaki 852-8523, Japan., 4.National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hanoi, 100000 Vietnam., 5.Vietnam Research Station, Center for Infectious Disease Researcher in Asia and Africa, Institute of Tropical Medicine, Nagasaki University, Sakamoto 1-12-4, Nagasaki 852-8523, Japan.)