Binh NV, Lan PT, Tinh PT, Nguyen TMN. Description of the First Pandemic Influenza A (H1N1) Cases in Vietnam, June-July 2009. OSIR [internet]. 2023 May 30 [cited 2026 Oct. 5];3(1):10-3. available from: https://he02.tci-thaijo.org/index.php/OSIR/article/view/263363