Figure 1.
Maps showing (a) the location of Southern Sudan in Africa, its ten states and major towns, highlighting its large size and low population density, (b) areas of Southern Sudan with structures for onchocerciasis control, either in the form of community-drug distributors (red, hatched) or supervision centres for community-directed treatment with ivermectin (red, not hatched), (c) areas covered by the community-based network for Guinea worm eradication, and (d) trachoma-endemic areas already targeted with the SAFE strategy through the Guinea worm network. Both community-based structures shown in (b) and (c) are suitable for additional mass drug administration (MDA) of preventive chemotherapy (PCT).