A transmission electron micrograph shows Ebola virus particles in this undated handout image released by the U.S. Army Medical Research Institute of Infectious Diseases (USAMRIID) in Fredrick, Maryland. REUTERS/USAMRIID/Handout
(Reuters) - Global health authorities are struggling to contain the world's worst Ebola epidemic since the disease was identified in 1976. The virus has killed more than 4,900 people.
Here is a timeline of the outbreak:
