West Africa Ebola Outbreak
The worst Ebola outbreak in history began in Guinea, eventually killing over 11,000 people
December 26, 2013
An Outbreak Unlike Any Before
The West Africa Ebola epidemic began in late 2013 in Guinea and rapidly spread to Sierra Leone and Liberia in 2014. By the time it was declared over in 2016, more than 11,300 people had died — making it by far the largest Ebola outbreak in history. Previous Ebola outbreaks had been contained quickly in remote villages. This one spread to crowded urban areas, exposing major weaknesses in the health systems of three of the world's poorest countries.
How It Spread and Why It Was So Hard to Stop
Ebola spreads through direct contact with bodily fluids of infected individuals. Traditional burial practices, which involved washing and touching the body, were a major driver of transmission. Mistrust of health workers and government authorities in communities that had experienced years of civil conflict led some families to hide sick relatives. Healthcare workers were at high risk — over 500 died. International health organizations like the WHO were criticized for responding too slowly in the early months.
Lessons for Global Health
The West Africa outbreak demonstrated that a weak public health system in one country can quickly become a global threat. It accelerated international investment in health infrastructure in low-income countries and led to the development and approval of the first Ebola vaccine, rVSV-ZEBOV, in 2019. The outbreak also influenced how the world prepared for the COVID-19 pandemic. Organizations like the Coalition for Epidemic Preparedness Innovations (CEPI) were founded directly as a result of the lessons learned. Use our date calculator to mark the timeline of this outbreak.