When the monsoon arrives in Alappuzha, water seems to find its way everywhere. Canals rise, drains fill up, and puddles linger in corners long after the rain has stopped.

And then there are the places you may barely notice: a flowerpot left in the yard, an old tyre by the wall, a bucket collecting rainwater, a gutter that has not drained properly. To us, they may look harmless. To a mosquito looking for somewhere to lay eggs, they are exactly what it needs.

That was the problem residents of Vadackal were living with. When researchers surveyed the Alappuzha ward in 2016, they found mosquito breeding sites in 64.2 out of every 100 homes they checked.

Think about that for a moment. On a street with ten homes, breeding sites could be present in six of them. The threat of dengue was taking shape in the most familiar of places, right outside people's doors.

Two years later, that number had fallen from 64.2 to just 8.6.

What changed? Residents had begun looking for breeding sites themselves, checking homes, talking to neighbours and acting on the places where water collected.

The effort was part of a study led by researchers from the ICMR-National Institute of Virology’s Kerala unit and TD Medical College, Alappuzha, conducted between November 2016 and October 2018. It asked a specific question: could residents themselves, organised properly, do what routine vector control drives had struggled to achieve in a district that sees dengue, chikungunya, and leptospirosis return with almost seasonal regularity?

Turning residents into their own inspectors

Before asking residents to change anything, the researchers first tried to understand what happened inside these neighbourhoods during mosquito season. Where was water collecting?........

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