A new malaria vaccine developed by researchers at the Oxford University and scientists from Burkina Faso has proven 77% effective against the disease in early trials – a figure far higher than any existing treatments. According to the BBC, the study, published in the Lancet, involved 450 children from Burkina Faso – and will now move to large-scale trials. The disease kills more than 400,000 people a year – many of them children in sub-Saharan Africa.