Ebola outbreak: Could epidemic infect 1.4m people?
13 October 2014 Last updated at 16:24 BST
The Ebola outbreak in West Africa is the deadliest occurrence of the disease since its discovery in 1976 - with more than 8,300 cases reported since March.
But without more concerted efforts to quarantine the epidemic, the number of cases could explode, experts warn.
BBC News explains - in 60 seconds.
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