Yellow fever is a mosquito-borne viral disease.
The disease occurs in tropical and subtropical areas. This disease can affect both sexes, all ages and races. Jungle yellow fever, of tropical Central and South America, occurs predominantly among adult males 20 to 40 years old who are exposed in the tropical forests. A certain type of mosquito, Aedes aegypti, is most often responsible for transmitting the virus. These mosquitoes are no longer found naturally in New York State.