WHO stressed though that "the job is not over," warning "more flare-ups are expected."

One of the most feared diseases in the world, Ebola killed more than 11,000 people across west Africa after it surfaced in Southern Guinea in December 2013.

At its peak, the tropical haemorrhagic virus devastated Guinea, Liberia and Sierra Leone, scything lives and dealing a hammer blow to weak economies and fragile health systems.

The announcement came 42 days - the equivalent of two incubation periods of the virus - after the last Ebola cases in Liberia were tested negative.

Liberia, the country worst hit by the outbreak with 4,800 deaths, discharged its last two patients from hospital - the father and younger brother of a 15-year-old victim – on December 3, 2015.

The outbreak infected almost 29,000 people and claimed 11,315 lives, according to official data.

Liberia was officially credited with beating the epidemic for a second time in September before another small cluster of cases emerged.

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