Dr. John Carvalho calculated an estimation of the overall Ebola numbers possible by February 1st, 2014 and suggested 1.6 million possible infections if the cases continue to double every two weeks. The CDC is estimating a similar number. Though these are the "worst case" scenarios, international efforts to curb Ebola virus will need to be stepped up. A pandemic of 1.4-1.6 million cases would be extremely challenging to control.
http://www.nytimes.com/interactive/2014/07/31/world/africa/ebola-virus-outbreak-qa.html
