Dengue Hemorrhagic Fever (DHF) is a disease transmitted to humans through the bite of a female mosquito infected with the dengue virus. The Aedes aegypti mosquito as the main vector and Aedes albopictus as the potential vector. In 2021, there were 33 cases of DHF in Indragiri Hulu, increasing to 78 cases in 2022 and decreasing the following year to 21 cases with the highest IR in the Sipayung H…