Ravi Patel Februari 25, 2025 ACTIVE, ASIA, ASIA SOCIETY FOR SOCIAL IMPROVEMENT AND SUSTAINABLE TRANSFORMATION, CANCER PREVENTION, CLINICAL TRIALS, DA NANG, DA NANG ONCOLOGY HOSPITAL, DISEASE PREVENTION, ELEKTA, HANOI, HEALTHCARE, HO CHI MINH CITY, HO CHI MINH CITY ONCOLOGY, HO CHI MINH CITY ONCOLOGY HOSPITAL, HPV VACCINE, K HOSPITAL, MEDICINE, VIETNAM, VNEXPRESS INTERNATIONAL, WORLD HEALTH ORGANIZATION