Spatial and temporal distribution of infectious disease epidemics, disasters and other potential public health emergencies in the World Health Organisation Africa region, 2016-2018 by Talisuna, AO, Okiro, EA, Yahaya, AA, Stephen, M, Bonkoungou, B, Musa, EO, Minkoulou, EM, Okeibunor, J, Impouma, B, Djingarey, HM, Yao, NKM, Oka, S, Yoti, Z, Fall, IS