Ebola Outbreak In West Africa

A health worker takes a man's temperature, center, before his is allowed to enter into a government building, with a message, right, reading 'Kindly wash your hands before entering' the building in Monrovia, Liberia, Thursday, Jan. 14, 2016. The World Health 

Organization declared an end to the deadliest Ebola outbreak ever on Thursday after no new cases emerged in Liberia, though health officials warn that it will be several more months before the world is considered free of the disease that claimed more than 11,300 lives over two years. (AP Photo/Abbas Dulleh)

The world breathed a sigh of relief on Jan. 14, 2016, as a two-year Ebola epidemic that killed 11,000 and triggered a global health alert was declared over, with Liberia the last country given the all-clear.

The deadliest outbreak in the history of the feared tropical virus wrecked the economies and health systems of the three worst-hit west African nations after it emerged in southern Guinea in December 2013.

At its peak, it devastated Guinea, Liberia and Sierra Leone, with bodies piling up in the streets and overwhelmed hospitals recording hundreds of new cases a week.

Rick Brennan, the World Health Organization's chief of emergency risk management, hailed an important milestone but told reporters in Geneva that "the job is still not done", pointing out that there had already been 10 small flare-ups because of the persistance of the virus in survivors.

UN chief Ban Ki-moon warned the region can expect sporadic cases in the coming year but added "we also expect the potential and frequency of those flare-ups to decrease over time".