Ebola no longer constitutes a global health emergency, but a high level of vigilance must be maintained in West African countries to prevent and control new outbreaks, the World Health Organization (WHO) said Tuesday in Geneva.
The UN health agency had imposed its highest alert level in August 2014 as the virus ravaged in West Africa.
"The original Ebola outbreak has come to an end," said Robert Steffen, vice chairman of WHO's expert advisory panel on Ebola.
But he added that "complacency at this stage would be completely wrong."
Last month health officials in Guinea said there was a small number of new infections, after WHO had declared Guinea free of Ebola in December.
Sierra Leone recorded two cases in January.
The outbreak started in Guinea in late 2013 and spread mainly to neighbouring Liberia and Sierra Leone.
More than 11,300 people have died in the outbreak.