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WHO cautions that the 3 countries remain at high risk of additional small outbreaks of Ebola, like the most recent one in Liberia. To date, 10 such flare-ups have been identified that were not part of the original outbreak, and are likely the result of the virus persisting in survivors even after recovery. Evidence shows that the virus disappears relatively quickly from survivors, but can remain in the semen of a small number of male survivors for as long as 1 year, and in rare instances, be transmitted to intimate partners.

“We are now at a critical period in the Ebola epidemic as we move from managing cases and patients to managing the residual risk of new infections,” says Dr Bruce Aylward, WHO’s Special Representative for the Ebola Response. “The risk of re-introduction of infection is diminishing as the virus gradually clears from the survivor population, but we still anticipate more flare-ups and must be prepared for them. A massive effort is underway to ensure robust prevention, surveillance and response capacity across all three countries by the end of March.”

WHO and partners are working with the Governments of Guinea, Liberia and Sierra Leone to help ensure that survivors have access to medical and psychosocial care and screening for persistent virus, as well as counselling and education to help them reintegrate into family and community life, reduce stigma and minimize the risk of Ebola virus transmission.

The Ebola epidemic claimed the lives of more than 11 300 people and infected over 28 500. The disease wrought devastation to families, communities and the health and economic systems of all 3 countries.