A necklace designed for babies in India could be a lifesaver - thanks to the immunisation records it stores.
Because infant immune systems aren't fully developed, vaccines help to protect them from the most serious of childhood infections like measles and pneumonia.
In rural Rajasthan vaccination rates are low - and helping to educate and remind parents is difficult.
Suranjana Tewari went to find out about one project linking tradition with technology to protect children's health.
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