Dengue fever is an infection caused by a virus which is transmitted by mosquitoes.
Mortality is negligible. In this syndrome, after an episode of fever resembling Dengue fever, the defervescence of fever may be accompanied by a severe volume depletion in the body causing shock and bleeding manifestations, either of which may result in death. This can also occur in epidemic proportions like dengue fever. The spread of the dengue virus is closely linked to the development of human settlements in this century and specially to the urban development in developing countries. Indeed, outbreaks of dengue fever in urban areas can be explosive with attack rates up to 70 per cent.