In the absence of complications, dengue disappears in a week and is rarely fatal. But since there is no immunity to the disease, you may acquire it again in five years.
In a few cases, bleeding complications such as bleeding from the nose, gums or gastrointestinal tract may occur and can kill the patient. Dengue can also cause hematuria (blood in the urine) and hypermenorrhea (prolonged menstruation).
Another disease you can get from the day-biting Aedes mosquito is yellow fever or yellow jack. This is a common problem in Africa, South America, and other tropical countries.
Epidemics have occurred in the United States in the late 17th century. The last one struck Philadelphia in 1793 and killed 5,000 people.