Dengue Hemorrhagic Fever (DHF) or Dengue Haemorrhagic Fever (DHF) is a disease caused by a virus and spread by the Aedes mosquito (Stegomyia). Bengkalis District Health Office data for 2018 - 2019, states that 8 sub-districts consisting of 80 sub-districts with endemic status, 21 with sporadic status. One of the districts with dengue fever in Bengkalis Regency is Siak Kecil District. There …