The largest Ebola unit ever built opened in the Liberian capital Monrovia with 120 beds on August 17 but was immediately overwhelmed, with staff forced to turn patients away at its gates, despite more than doubling its capacity.
Five months later to the day it registered no patients at all for the first time, and staff this week marked a drastic retreat of an epidemic which has killed thousands by dismantling and burning the first tent put up at the clinic.
"In line with this development we think it was appropriate to reduce the treatment centre. Today we have 60 beds and at the end of February we hope to go down to 30 beds. This does not mean that we are closing ELWA-3 -- we are just reducing the capacity."
"We still have the capacity to scale up to 120 beds within 24 hours if the need arises," he added, as staff carried wooden planks and canvas to a large fire nearby.
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Soon after it opened, staff at ELWA-3 were struggling to screen new arrivals, care for admitted patients or safely remove dead bodies and transport them to the crematorium.
By the end of the year the centre had taken in 1,826 patients, 1,225 of whom tested positive for Ebola and 498 of whom survived.
But Liberia and its neighbours Sierra Leone and Guinea have reported huge progress on stemming the spread of Ebola since the summer, when the joint tally was several hundred new infections a week.
He said the crisis had cost Liberia $93 million (82 million euros) in lost revenue, with the key mining sector coming "to a grinding halt".
Bell said the downsizing of ELWA-3's capacity went hand in hand with a reduction in workers on the ground, noting that MSF staff had performed an "incredible job".
MSF said in its latest crisis update on Monday it was treating just two patients in ELWA-3, a huge tented field clinic put up on the grounds of a missionary hospital.