Dengue fever
Dengue fever is a contagious disease caused by the dengue virus, which has four serotypes. It is primarily transmitted by the Aedes aegypti and Aedes albopictus mosquitoes. When these mosquitoes bite a person infected with dengue fever, the virus multiplies in the mosquito's cells, and some of it enters its salivary glands. When the mosquito bites another person, it can transmit the virus to them. This disease often spreads during the rainy season but can now be found year-round.