Dengue's Wild Card: India's Vaccine Rollout Just Got a Whole Lot More Complicated New research has thrown up a curveball that could potentially alter India's ambitious plan to introduce a dengue vaccine by next year.
A nationwide mapping of dengue virus strains conducted across eight states and union territories found all four serotypes circulating simultaneously.
The study, led by the ICMR National Institute of Virology in Pune, analyzed over 6,800 lab confirmed dengue samples collected between 2023 and 2025.