Dengue is a mosquito-borne viral infection. Dengue virus is transmitted by female mosquitoes mainly of the species Aedes aegypti and, to a lesser extent, Ae. Albopictus. The Aedes aegypti mosquito is the primary vector of dengue. The virus is transmitted to humans through the bites of infected female mosquitoes. After virus incubation for 4–10 days, an infected mosquito is capable of transmitting the virus for the rest of its life. The Symptom of Dengue fever is a severe, flu-like illness that affects infants, young children and adults, but seldom causes death.