 ria: Three diseases wey dey kill pickin under five years and how to prevent am 5 January 2018 Wia dis foto come from, Science Photo Library Wetin we call dis foto, Malaria na di number 1 cause of sickness for West Africa Even as World Health Organisation don approve new typhoid vaccine drug to take prevent di disease, vaccine never dey for di top three disease wey dey take lives of pickin under five years for Nigeria. 