A Cohort Study to Determine the Incidence of Dengue Fever and to Build Capacity for Dengue Vaccine Trials in Dengue-endemic Regions of South Asia

Blood samples will be collected during the Suspected Dengue First Visit. All study subjects with AFI (fever \[body temperature ≥ 38°C/≥ 100.4°F\] on ≥ 2 consecutive calendar days, measured at least twice, at least 8 hours apart) should be seen at a designated study hospital/clinic by the study physician. The Suspected Dengue First Visit should be scheduled within 7 days from the onset of fever (Days 2-7) and should ideally take place on the second day of fever (Day 2).