Transmission
Dengue virus is primarily transmitted by Aedes mosquitoes, particularly A. aegypti.[12] These mosquitoes usually live between the latitudes of 35° North and 35° South below an elevation of 1,000 metres (3,300 ft).[12] They typically bite during the early morning and in the evening,[26][27] but they may bite and thus spread infection at any time of day.[28] Other Aedes species that transmit the disease include A. albopictus, A. polynesiensis and A. scutellaris.[12] Humans are the primary host of the virus,[12][21] but it also circulates in nonhuman primates.[29] An infection can be acquired via a single bite.[30] A female mosquito that takes a blood meal from a person infected with dengue fever, during the initial 2–10 day febrile period, becomes itself infected with the virus in the cells lining its gut.[31] About 8–10 days later, the virus spreads to other tissues including the mosquito's salivary glands and is subsequently released into its saliva