Le, Thanh Thi, Hang Thu Pham, Hien Thi Pham, Hang Khanh Le Nguyen, Thach Co Nguyen, Phuong Mai Vu Hoang, Huong Thu Tran, Son Vu Nguyen, Giang Huong Ngo, and Mai Quynh Le. “Circulation of Influenza B Lineages in Northern Viet Nam, 2007–2014”. Western Pacific Surveillance and Response 6, no. 4 (November 11, 2015). Accessed May 15, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/328.