Dengue is a disease transmitted to humans by infected mosquitoes.
The potentially fatal disease is caused by a group of four viruses that are mosquito born. The four virus are closely related, however they are anitgenically distinct. Unfortunately, a person can have several dengue infections in their lifetime because a person does not become immune to the other three viruses if infected. Dengue fever is transmitted by mosquitoes who have been infected with the dengue virus. In the Western Hemisphere, the Aedes aegypti is the one mosquito species that transmits the disease.