Western African Ebola epidemic

The Western African Ebola epidemic was a significant outbreak of the Ebola virus disease (EVD) that occurred in West Africa from 2013 to 2016. It was the most widespread outbreak of Ebola virus disease in history, causing major loss of life and socioeconomic disruption in the region, particularly in Guinea, Liberia, and Sierra Leone.

Background

The Ebola virus is a member of the Filoviridae family, which also includes the Marburg virus. The virus is transmitted to humans from wild animals and spreads in the human population through human-to-human transmission. The average EVD case fatality rate is around 50%, but it can vary from 25% to 90% in different outbreaks.

Outbreak

The outbreak began in December 2013 in a small village in Guinea. The first cases were not identified as Ebola, and the disease spread to the capital, Conakry, and across borders into Liberia and Sierra Leone. The epidemic was officially declared in March 2014.

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Simplified map of the 2014 Ebola virus epidemic in West Africa

Spread and Impact

The epidemic spread rapidly, overwhelming the healthcare systems of the affected countries. By mid-2014, the World Health Organization (WHO) declared the outbreak a Public Health Emergency of International Concern. The epidemic reached its peak in late 2014, with thousands of new cases reported weekly.

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Map showing the ongoing Ebola outbreak

The outbreak had a devastating impact on the affected countries, causing over 11,000 deaths and infecting more than 28,000 people. The healthcare systems in these countries were severely strained, and the epidemic had significant economic and social consequences.

Response

The international response to the epidemic included efforts from governments, non-governmental organizations, and international bodies such as the WHO. Treatment centers were established, and measures were taken to improve infection control and surveillance.

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Kenema Hospital in Sierra Leone during the Ebola outbreak

Healthcare and Treatment

Healthcare workers faced significant challenges, including a lack of resources and high risk of infection. Experimental treatments and vaccines were deployed, and by 2015, the situation began to improve as the number of new cases declined.

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Ebola Treatment Unit

Containment and Decline

By 2016, the epidemic was largely contained, with the WHO declaring the end of the outbreak in June 2016. However, sporadic cases continued to occur, highlighting the need for ongoing vigilance and improved healthcare infrastructure.

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Situation map of the 2014 West Africa Ebola virus outbreak

Legacy

The Western African Ebola epidemic highlighted the need for better global preparedness for infectious disease outbreaks. It led to significant changes in how the international community responds to such crises, including the development of new vaccines and treatments.

Related pages

• Ebola virus disease
• World Health Organization
• Public Health Emergency of International Concern