Thesis title: Etiology, clinical epidemiology, characteristics and prognostic factors of acute encephalitis in Vietnamese children Code: 62720135 Speciality: Pediatrics Ph D Student: Trần Thị Thu Hương Course: 32 Academic Supervisor: Prof Phạm Nhật An, Ph D University: HaNoi Medical University SUMMARY OF NEW FINDINGS OF Ph D THESIS + Improving the etiologic determination rate is likely to cause acute encephalitis up to 57.6% and the rate of possible etiology is 6, 7%.