The Phase III or dengue vaccine clinical trial started last 2011. The study conducted in the five Asian countries, including the Philippines, is called the Dengue vaccine CYD14 study. The Dengue vaccine CYD14 study has two phases: (1) the active surveillance phase and (2) the long-term follow-up for safety phase. Download the infographic of the continue reading : Understanding CYD14 or the clinical trial phase of the dengue vaccine