The frontline health worker in Bihar has a problem. She is supposed to counsel new mothers on breastfeeding, complementary feeding, immunisation schedules and family planning. She has been trained and she has the knowledge. But she walks into a household where the mother-in-law is sceptical, the husband is away and the new mother is exhausted, and she has about ninety seconds of attention before the conversation turns to something else.
Her training is in her head and her confidence varies. What she says depends on memory, and memory is unreliable under pressure.
The programme was built to solve this problem, and the tool it used was a deck of cards. There was no app.
What the programme used
The programme used a deck of illustrated cards, printed, laminated and small enough to carry in a bag. Each card showed one health behaviour, such as exclusive breastfeeding for the first six months, with a clear illustration and a short message. On the back of each card was a phone number linked to a short audio clip.
During a home visit, the health worker could turn to the relevant card, show the illustration to the mother and play the audio clip on her phone. The audio was in the local dialect, recorded in a voice the community trusted. The health worker no longer had to deliver the message from memory, because she had the card in her hand and the recorded voice on the phone.
Why this worked
It worked because of trust, and the technology mattered less.
The health worker’s own credibility varied. She might be young, unmarried or from a different caste, and the mother-in-law might dismiss her. The card was printed, official-looking and illustrated, and it carried a different kind of authority. The audio clip added a third voice in the room, one that was consistent, knowledgeable and could be played again.
The programme gave the health worker a script she could rely on without reading from a manual. It gave the mother a picture she could remember after the visit. It also gave the mother-in-law a clip she could play for the neighbours, so a household visit could turn into a conversation in the wider community.
The reach
Tens of thousands of frontline health workers across Bihar used it, and through them it reached millions of households. It combined physical cards that people trusted, recorded audio on a mobile phone, and the existing cadre of health workers to deliver both. It needed no new infrastructure, no app download and no internet connection.
The programme was evaluated rigorously. Households visited by workers carrying the cards showed improvements in key health behaviours, including breastfeeding practices, awareness of immunisation and conversations about family planning, compared with households visited by workers without them.
What stayed with us
We keep coming back to two things from this work.
The least technical component was the most important. The laminated card made the health worker confident enough to stay in the conversation, more than the phone or the audio did. Technology is often the least interesting part of a health intervention. Here the card was the intervention, and the phone extended its reach.
The design also respected the health worker’s working conditions. She was not asked to learn a new app, charge a tablet or find her way through a menu. She turned a card and dialled a number. The design assumed she was busy, short of resources and working in a household where she had about two minutes of goodwill before the conversation moved on. That assumption was correct, and most health technology products fail to make it.
The field kit that accompanies this work, The Measurement Checklist, asks practitioners to write down the sentence they hope to say at the end of a study before they choose a method. The programme started from a similar place. It asked what the health worker needs to say, and what the smallest tool is that helps her say it with confidence.