Marburg virus disease was first recognized in 1967 during simultaneous outbreaks in Germany and Yugoslavia, linked to African green monkeys from Uganda. Since then, outbreaks have occurred mainly in Africa, with cases in Ghana, Guinea, and Uganda, among others. The disease is highly fatal, with recent outbreaks (before the current in Rwanda) in Tanzania and Equatorial Guinea in 2023. Key historical outbreaks include Angola (2004-2005) and the Democratic Republic of Congo (1998-2000), which had some of the highest fatality rates. Read more on this link