Gareth Willmer

A report has found that mobile data costs in Africa are 3,5 times the "affordable" threshold. This is said to be as a result of low-level competition in most countries which is pushing up prices.

Just a few years ago, Nigeria was one of three countries still recording polio cases. So the stakes were high for its vaccination tracking programme: it simply had to work. It took budgeting and planning — where to send vaccinators, for example, or how much vaccine was needed. It also needed