Ung T thi H, Hoang PVM, Nguyen SV, Nguyen HLK, Nguyen P thi K, Phan DT, Le TT, Nguyen AP, Nguyen TC, Hasebe F, Le M thi Q. Occurrence of the Omicron variant of SARS-CoV-2 in northern Viet Nam in early 2022. Western Pac Surveill Response J [Internet]. 2022 Sep. 19 [cited 2024 Nov. 21];13(3):5. Available from: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/955