Effectiveness of Larva Monitoring Training on Knowledge of Dengue Hemorragic Fever Control among Primary School Students in Sibolga, North Sumatera. J Epidemiol Public Healt. 2019;4(3):183-188. Accessed January 17, 2026. https://www.jepublichealth.com/index.php/jepublichealth/article/view/140