THE DISTRIBUTION OF PNEUMOCOCCAL SEROTYPES CAUSES PNEUMONIA IN CHILDREN UNDER 5 YEARS OF AGE IN NGHE AN. YHCĐ [Internet]. 2022 Nov. 30 [cited 2026 Sept. 8];63(chuyên đề 3-HN Sản Nhi Nghệ An). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/522