“29. PARENTAL KNOWLEDGE OF CHILDREN UNDER 5 YEARS OLD ABOUT DISEASE AND DIPHTHERIA VACCINATION”. Vietnam Journal of Community Medicine 65, no. CĐ 6 - Bệnh viện Lê Văn Thịnh (July 31, 2024). Accessed September 9, 2026. https://tapchiyhcd.vn/index.php/yhcd/article/view/1384.