50. SOME FACTORS AFFECTING FULL AND TIMELY VACCINATION OF CHILDREN AGED 12-24 MONTHS IN 4 COMMUNITIES IN SPECIALLY DIFFICULT AREAS OF YEN CHAU DISTRICT, SON LA PROVINCE IN 2023. YHCĐ [Internet]. 2025 Mar. 4 [cited 2026 Sept. 9];66(2). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/2056