First dengue vaccine introduced in India.
Potential risk for dengue‑naïve children to experience a simulated primary infection.
Provides immunity to dengue types one and two, not type three.
Ongoing research to improve coverage of all dengue strains.
Health officials warn that in children who have never been infected, the vaccine could act like a first dengue infection, offering protection against two virus types but not the third.
Further studies are planned to understand how to protect against all dengue strains.
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