World Immunization Week 2016 is April 24–30. Coincidentally, on April 4 the Philippines launched a dengue immunization program targeting more than 1 million schoolchildren using the world's first dengue vaccine, CYD-TDV (Dengvaxia®). It took more than 20 years of research and development, including two Phase 3 clinical trials involving over 35,000 participants aged 2–16 years, for this new vacc...