A worker sprays anti-mosquito fog at Cendana Residence in South Tangerang, Indonesia, Feb. 17, 2019. Controlling the number of the adult and larval population of the mosquito was essential for reducing transmission of the dengue viruses. As of Feb. 1, 2019, 15,132 cases of dengue fever were reported in Indonesia this year, with a total of 145 deaths, according to the health ministry. (Xinhua/Agung Kuncahya B.)