India's first dengue vaccine arrives with a safety caveat

India's first dengue vaccine, Qdenga, has arrived, but with an important safety caveat. In children never previously infected, the vaccine can mimic a primary dengue infection — offering protection against DENV-1 and DENV-2 but not against DENV-3, and potentially enhancing disease. This underlines the need for careful screening before administration.

Nabka Insight

First dengue vaccine in India plus its serotype-specific caveat — a science-and-health talking point.

Key facts

Qdenga is India's first dengue vaccine.
In previously uninfected children it can simulate a primary infection.
Protects against DENV-1 and DENV-2 but not DENV-3.

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