Fig. 3

The study locations in Nigeria, including the spatial distribution of health facilities in Adamawa and Bauchi States; the upper part shows the map of Africa indicating the location of Nigeria (A), and the map of Nigeria (B) indicating the locations of Bauchi State (C) and Adamawa State (D); the lower part shows the distribution of health facilities in Bauchi State (A) and Adamawa State (B). IDP, internally displaced persons’ camp