Ha, V. H. ., Nguyen, D. T. ., Van, N. T. T. ., Long, P. D. ., & Thai, P. Q. . (2021). Coverage of hepatitis B vaccine birth dose in Vietnam during 2014-2018. Tạp Chí Y học Dự phòng, 30(4), 86–92. https://doi.org/10.51403/0868-2836/2020/254