Dengue fever (DF) or dengue hemorrhagic fever (DHF) are acute febril disease found in tropical areas, with geographic distribution similar to malaria.

The disease is caused by one of the four serotypes of the virus from the genus Flavivirus, family Flaviviridae. Each serotype is different enough so that no cross-protection and epidemics caused by several serotypes (hiperendemisitas) can occur. Dengue fever is spread to humans by the mosquito Aedes aegypti. %%art-more%%