11. KNOWLEDGE, ATTITUDES, PRACTICES AND SOME FACTORS ASSOCIATED WITH SOIL-TRANSMITTED HELMINTH INFECTIONS IN PRIMARY SCHOOL STUDENTS IN QUANG NINH PROVINCE IN 2021. YHCĐ. 2025;66(CĐ3-HNKH Ký Sinh Trùng VN lần thứ 51). doi:10.52163/yhc.v66iCĐ3.2128