The Dengue Vaccine Initiative welcomes the demonstrated vaccine efficacy across age groups and geographic regions. In particular, the Initiative is encouraged by the overall level of protection and prevention of severe dengue and hospitalizations among individuals 9 years of age or older, along with the significant reduction in dengue cases among both seropositive and seronegative individuals within this age group without apparent safety issues. However, DVI considers further evaluation in the population at large, especially in children younger than 9 years of age, to be crucial to better understand the effects of this vaccine, as well as to clarify the duration of protection. Of particular importance will be to understand why there appeared to be an increased risk of hospitalization among the very young during the third year, and whether this risk continues into subsequent years. Safety signals clearly exist for persons aged less than 5, but the mechanism remains unclear. DVI looks forward to further information from the additional years of long-term safety follow up from these three ongoing trials. Additionally, the Initiative continues to be highly interested in whether fewer number of doses could provide similar levels of protection by this candidate, as well as its forecasted price if licensed.