Between 2000 and 2006 there were 30 communicable disease outbreaks in 14 different conflict-affected countries, including the Democratic Republic of the Congo (Ebola, Marburg, monkeypox, cholera, plague) and the Sudan (meningitis, relapsing fever, hepatitis E, ebola, cholera).  The most common diseases in the Sudan include pneumonia, measles, and malaria.  The WHO document, "Communicable Disease Risk Assessment: Protocol For Humanitarian Emergencies" explains why communicable diseases are such a huge issue for both refugee populations and IDPs .