Stunting rates range between 10% in prosperous areas of southern Nigeria to over 50% in parts of the north.
Since the violence in DRCs Kasai region last March, 1.4 million people have been displaced.
The Uganda oil pipeline through Tanzania should be made into a bigger prosperity corridor, with fibre optics, roads, railways and food silos.
But by far the worst-affected countries have been Somalia and South Sudan. Zambia, lies in the middle of a range of countries caught in the surge of cases, from struggling Mozambique to relatively prosperous Kenya.
In East Africa Ethiopia is likely to remain the fastest growing economy, but growth is projected to slow in Tanzania with moderation in investment growth.