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A new HIV vaccine trial has shown promising results, but is this the big breakthrough we鈥檝e all been waiting for? Claudia Hammond talks to Dr Sheena McCormack about the significance of these results. Claudia also talks to researchers about a new initiative to help develop vaccines to tackle the neglected diseases found mainly in low-income countries.

A new road traffic campaign in Ethiopia hopes to tackle the drivers who think chewing Khat helps them drive better.

And why a hunter-gatherer lifestyle could be the answer to our growing waistlines.