Article published on Lancet, October 21, 2014 ( http://www.sciencedirect.com/science/article/pii/S0140673614618286 ) assessing the potential for international dissemination of Ebola. Authors analysed International Air Transport Association data for worldwide flight schedules between Sept 1, 2014, and Dec 31, 2014, and historic traveller flight itinerary data from 2013 to describe expected global population movements via commercial air travel out of Guinea, Liberia, and Sierra Leone and the potential risk of disease spread by air travel.