Until 2014 Ebola had only generated a few limited outbreaks, but this time we're already into the 1000s and millions of cases being predicted.
World Health Organisation - http://www.who.int/mediacentre/factsheets/fs103/en/
Wikipedia - http://en.wikipedia.org/wiki/Ebola_virus_disease
Fresh Ebola outbreak has potential to spreadCNN - 14-Aug-2018
New outbreak in an area of active conflict makes difficult to contain the infection
Lack of UK Ebola strategy and procedure put lives at riskPharmaceutical Journal - 27-Jan-2016
House of Commons report says UK’s response was undermined by systemic delays.
Ebola vaccine 100% effectiveBBC - 31-Jul-2015
No new cases in 2,000 close contacts when vaccinated immediately compared to 16 cases if vaccinated several weeks later.