Making waves: can radio reduce child mortality?
In The Lancet Global Health, Sophie Sarrassat and colleagues report on the first cluster randomised controlled trial of a radio intervention to reduce child mortality. The study is exceptional in its design and ambition: a systematic review of 111 mass media interventions to improve child survival found that only 32 used moderate to strong evaluation designs and only one measured an actual health outcome.2This elegant Burkinabé trial bucks all trends.