The Ebola outbreak in West Africa was first reported in March 2014, and has rapidly become the deadliest occurrence of the disease since its discovery in 1976.
In fact, the current epidemic sweeping across the region has now killed more than all other known Ebola outbreaks combined.
Up to 23 November, 5,689 people had been reported as having died from the disease in six countries; Liberia, Guinea, Sierra Leone, Nigeria, the United States and Mali.
The total number of reported cases is in excess of 15,000.
The World Health Organization (WHO) admits the figures are underestimates, given the difficulty collecting the data.