THE STATUS OF FULL AND ON- SCHEDULE VACCINATION WITH 8 TYPES OF VACCINES AMONG CHILDREN UNDER 1 YEAR OLD AT QUAN TRIEU WARD, THAI NGUYEN CITY. YHCĐ [Internet]. 2021 June 21 [cited 2026 Sept. 9];62(4 (2021). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/123