India's first dengue vaccine is nearing rollout as a study maps circulating virus strains. All four dengue serotypes are now circulating simultaneously in eight key states. This finding is crucial for shaping effective vaccination strategies across the nation. DENV-2 remains the dominant strain, but co-infections increase severe disease risk. Continuous molecular surveillance will guide future outbreak forecasting and vaccine deployment.

India faces heightened dengue risks as multiple virus strains co-circulate, complicating future vaccination efforts, a new study reveals.

India's dengue virus is evolving dangerously, with multiple strains circulating, increasing severe illness risks and complicating vaccination strategies.