Factbox: Key facts about Ebola epidemic two years after it was first declared

LONDON (Thomson Reuters Foundation) - Two years after the world's worst known outbreak of Ebola was first identified, West Africa is still experiencing small flare-ups, the most recent in Guinea.

The World Health Organization (WHO) has warned that the deadly haemorrhagic virus could resurface at any time, since it can linger in the eyes, central nervous system and bodily fluids of some survivors.

Here are some key facts and figures about the epidemic, which has killed more than 11,300 people and infected 28,600, almost all in the three worst-affected nations of Liberia, Guinea and Sierra Leone:

Here are key developments in the three most severely affected countries:

GUINEA

SIERRA LEONE

LIBERIA

Sources: World Health Organization, Centers for Disease Control and Prevention, Reuters News, Thomson Reuters Foundation

(Reporting by Tim Pearce and Alex Whiting, Editing by Tim Pearce. Please credit the Thomson Reuters Foundation, the charitable arm of Thomson Reuters, that covers humanitarian news, women's rights, trafficking, corruption and climate change. Visit http://news.trust.org)