Dengue fever can be caused by any one of four types of dengue virus: DEN-1, DEN-2, DEN-3, and DEN-4. You can be infected by at least two if not all four types at different times during your lifetime, but only once by the same type.
Volunteer for NIAID-funded clinical studies related to Dengue Fever on ClinicalTrials.gov.
View a list of links for more information about dengue fever.